Publish Date: 1999 / Topic: Environmental aspects

1. 1999 International Ash Utilization Symposium materials for the next millenium : October 18-20, 1999, Lexington, Kentucky, USA /

Published:: 1999
View in NAL's Catalog:: CAT11065446
Format:: Software

2. 1999 Update of ambient water quality criteria for ammonia

Published:: 1999
Author:: Delos, Charles.
View in NAL's Catalog:: CAT11129402
Format:: Electronic

3. Acquacoltura : qualità dell'ambiente e del prodotto : Castiglione della Pescaia-Grosseto, 30 settembre-1 ottobre 1996 /

Published:: 1999
View in NAL's Catalog:: CAT11094416
Format:: Book

4. After the rain urban runoff /

Published:: 1999
View in NAL's Catalog:: CAT30920753
Format:: VHS

5. Against the grain : the genetic transformation of global agriculture /

Published:: 1999
Author:: Lappé, Marc.
View in NAL's Catalog:: CAT10874022
Format:: Book

6. The agri-environmental situation and policies in the Czech Republic, Hungary and Poland.

Published:: 1999
View in NAL's Catalog:: CAT11067070
Format:: Book

7. Agricultura y medio ambiente /

Published:: 1999
Author:: Narbona, Cristina.
View in NAL's Catalog:: CAT11068761
Format:: Book

8. Agricultura y sociedad en México : diversidad, enfoques, estudios de caso /

Published:: 1999
View in NAL's Catalog:: CAT11089632
Format:: Book

9. Agricultural crisis in America : a reference handbook /

Published:: 1999
Author:: Hoag, Dana L.
View in NAL's Catalog:: CAT11061647
Format:: Book

10. Agriculture and the environment /

Published:: 1999
Author:: Uri, Noel D.
View in NAL's Catalog:: CAT10870655
Format:: Book

11. Agriculture and the environment : development of European Union agri-environment policy : an Agra Europe special study /

Published:: 1999
Author:: Gardner, Brian, 1938-
View in NAL's Catalog:: CAT11068327
Format:: Book

12. Agriculture waste emerges as major state, federal environmental concern.

Published:: 1999
View in NAL's Catalog:: CAT10978630
Format:: Book

13. Agriculture, fertilizers, and the environment /

Published:: 1999
Author:: Lægreid, M.
View in NAL's Catalog:: CAT11066219
Format:: Book

14. AgroAmbiente

Published:: 1999
View in NAL's Catalog:: CAT30933976
Format:: Electronic

15. Alimentation mondiale 2050 : bien nourrir les hommes sans dégrader la planète : colloque organisé sous l'égide des associations Animation, mémoire, international [et] Rayonnement français, réalités internationales.

Published:: 1999
View in NAL's Catalog:: CAT11118481
Format:: Book

16. Alternatives to pesticides in tropical countries : sustainable agriculture--food security with food safety /

Published:: 1999
Author:: Dudani, A. T. 1924-
View in NAL's Catalog:: CAT11085831
Format:: Book

17. Ambient water quality criteria for dissolved oxygen prepared pursuant to section 2(e) of the Environment Management Act, 1981.

Published:: 1999
Author:: Truelson, R. L.
View in NAL's Catalog:: CAT11062110
Format:: eBook

18. Ambient water quality guidelines (criteria) for turbidity, suspended and benthic sediments overview report.

Published:: 1999
View in NAL's Catalog:: CAT11067523
Format:: eBook

19. Analysis of carbon isotopes, determination of ground-water age, and estimated characteristics of the contaminant source at two fuel-spill plumes, western Cape Cod, Massachusetts, 1996 /

Published:: 1999
Author:: Savoie, Jennifer.
View in NAL's Catalog:: CAT10875315
Format:: Book

20. Animal responses to global change in the North /

Published:: 1999
View in NAL's Catalog:: CAT11068361
Format:: Book

21. Animal waste lagoon water quality study : a research report by Kansas State University /

Published:: 1999
View in NAL's Catalog:: CAT30929867
Format:: Book

22. Application of spatially referenced regression modeling for the evaluation of total nitrogen loading in the Chesapeake Bay Watershed

Published:: 1999
Author:: Preston, Stephen D., 1955-
View in NAL's Catalog:: CAT11119676
Format:: Electronic

23. Approaches to pesticide policy reform : building consensus for future action : a policy workshop in Hua Hin, Thailand, July 3-5, 1997 /

Published:: 1999
View in NAL's Catalog:: CAT11091661
Format:: Book

24. Aquaculture and the environment /

Published:: 1999
View in NAL's Catalog:: CAT30909121
Format:: Book

25. Aquaculture et environnement : réglementation et pratique des élevages de poissons marins : actes des journées nationales de travail, Brest, 2-3 octobre 1997 /

Published:: 1999
View in NAL's Catalog:: CAT11062451
Format:: Book

26. Arapahoe Basin master development plan : final environmental impact statement.

Published:: 1999
View in NAL's Catalog:: CAT11060602
Format:: Book

27. Areas susceptible to irrigation-induced selenium contamination of water and biota in the western United States / by Ralph L. Seiler, Joseph P. Skorupa, and Lorri A. Peltz.

Published:: 1999
Author:: Seiler, R. L.
View in NAL's Catalog:: CAT11089294
Format:: Book

28. Arsenic in drinking water /

Published:: 1999
View in NAL's Catalog:: CAT10878666
Format:: Book

29. Arsenic in ground water of the Willamette Basin, Oregon /

Published:: 1999
Author:: Hinkle, Stephen R.
View in NAL's Catalog:: CAT10879596
Format:: Book

30. Arzneimittelrückstände in der Umwelt : Bestandsaufnahme und Problemdarstellung /

Published:: 1999
Author:: Sattelberger, Robert.
View in NAL's Catalog:: CAT11098002
Format:: Book

31. Assessing biological effects from highway-runoff constituents

Published:: 1999
Author:: Buckler, Denny R.
View in NAL's Catalog:: CAT11110821
Format:: Microfilm

32. Assessing environmental effects of the North American Free Trade Agreement (NAFTA) : an analytic framework (phase II) and issue studies.

Published:: 1999
View in NAL's Catalog:: CAT11134177
Format:: Book

33. Assessing the effects of fire disturbance on ecosystems : a scientific agenda for research and management /

Published:: 1999
View in NAL's Catalog:: CAT10873771
Format:: Book

34. Assessment of nitrate contamination of the upper aquifer in the Manatí-Vega Baja area, Puerto Rico /

Published:: 1999
Author:: Conde-Costas, Carlos.
View in NAL's Catalog:: CAT10873323
Format:: Book

35. Assessment of sources of elevated nitrate in ground water in Northwest Ada County, Idaho, using environmental isotopes /

Published:: 1999
Author:: Howarth, Robert Brett.
View in NAL's Catalog:: CAT30920033
Format:: Book

36. Atlas raspredelenii︠a︡ ti︠a︡zhelykh metallov v obʺektakh okruzhai︠u︡shcheĭ sredy /

Published:: 1999
Author:: Sokolov, O. A.
View in NAL's Catalog:: CAT11120136
Format:: Book

37. Atmospheric environmental research : critical decisions between technological progress and preservation of nature /

Published:: 1999
View in NAL's Catalog:: CAT11060886
Format:: Book

38. Atrazine : midwest studies provide some answers /

Published:: 1999
Author:: Miller, Gerald.
View in NAL's Catalog:: CAT31072500
Format:: Book

39. Background report on fertilizer use, contaminants, and regulations

Published:: 1999
View in NAL's Catalog:: CAT30912008
Format:: Microfilm

40. Beyond Malthus : nineteen dimensions of the population challenge /

Published:: 1999
Author:: Brown, Lester Russell, 1934-
View in NAL's Catalog:: CAT30996011
Format:: Book

41. Beyond the green box : a conceptual framework for agricultural trade and the environment /

Published:: 1999
Author:: Runge, C. Ford
View in NAL's Catalog:: CAT10876170
Format:: Book

42. Bibliographie Umweltaspekte der Gentechnik /

Published:: 1999
Author:: Dörner, Erika.
View in NAL's Catalog:: CAT11080394
Format:: Book

43. Bibliography of recent papers in the biomedical literature on the health impacts of geologic processes and materials

Published:: 1999
View in NAL's Catalog:: CAT11112925
Format:: Microfilm

44. Bibliography of surface-mine reclamation research : 1976-1993 /

Published:: 1999
Author:: Crews, Jerry T.
View in NAL's Catalog:: CAT10873244
Format:: Book

45. Biennial report fiscal year 1998 and 1999 /

Published:: 1999
View in NAL's Catalog:: CAT30925096
Format:: Microfilm

46. Biodiversity, conservation and sustainable development : principles and practices with Asian examples /

Published:: 1999
Author:: Tisdell, C. A.
View in NAL's Catalog:: CAT10864072
Format:: Book

47. Bioenergy transport systems : life cycle assessment of selected bioenergy systems /

Published:: 1999
Author:: Forsberg, Göran.
View in NAL's Catalog:: CAT11101763
Format:: Book

48. Biogeochemistry of trace elements in coal and coal combustion byproducts /

Published:: 1999
View in NAL's Catalog:: CAT11092037
Format:: Book

49. Biogeokhimicheskiĭ monitoring i ot︠s︡enka rezhimov funkt︠s︡ionirovanii︠a︡ agroėkosistem na tekhnogenno zagri︠a︡zni︠a︡emykh pochvakh /

Published:: 1999
Author:: Pomazkina, L. V.
View in NAL's Catalog:: CAT11101052
Format:: Book

50. Bioindikat︠s︡ii︠a︡ radioaktivnykh zagri︠a︡zneniĭ /

Published:: 1999
View in NAL's Catalog:: CAT11076528
Format:: Book

51. Biological degradation of EDTA in pulping effluents at higher pH : a laboratory study /

Published:: 1999
Author:: Ek, Mats.
View in NAL's Catalog:: CAT11067239
Format:: Book

52. Biomass and vegetative characteristics of sawgrass grown in a tilting flume as part of a study of vegetative resistance to flow

Published:: 1999
View in NAL's Catalog:: CAT11110796
Format:: Microfilm

53. Biotechnology and biosafety : a forum /

Published:: 1999
View in NAL's Catalog:: CAT11134176
Format:: Book

54. Biotechnology for environmental protection in the pulp and paper industry /

Published:: 1999
Author:: Bajpai, P.
View in NAL's Catalog:: CAT11064631
Format:: Book

55. Birds and power lines : collision, electrocution and breeding /

Published:: 1999
View in NAL's Catalog:: CAT11036032
Format:: Book

56. Brown Creek timber sale draft environmental impact statement.

Published:: 1999
View in NAL's Catalog:: CAT30958591
Format:: Microfilm

57. Cadmium in soil and plants /

Published:: 1999
View in NAL's Catalog:: CAT11060878
Format:: Book

58. Canal Hoya timber sale : record of decision and final environmental impact statement.

Published:: 1999
View in NAL's Catalog:: CAT10870363
Format:: Book

59. Car care for cleaner water.

Published:: 1999
View in NAL's Catalog:: CAT11079639
Format:: Book

60. Carbon monoxide /

Published:: 1999
View in NAL's Catalog:: CAT11068351
Format:: Book

61. Carbon offsets as an alternative to large-scale logging : a case study in Guyana's forests /

Published:: 1999
Author:: Osborne, Tracey, 1969-
View in NAL's Catalog:: CAT11101632
Format:: Manuscript

62. Carbon tetrachloride /

Published:: 1999
View in NAL's Catalog:: CAT10876064
Format:: Book

63. Checklist for sustainable landscape management : final report of the EU concerted action AIR3-CT93-1210 : the landscape and nature production capacity of organic/sustainable types of agriculture /

Published:: 1999
View in NAL's Catalog:: CAT10871247
Format:: Book

64. Chlorine-36 in water, snow, and mid-latitude glacial ice of North America : meteoric and weapons-tests production in the vicinity of the Idaho National Engineering and Environmental Laboratory, Idaho /

Published:: 1999
View in NAL's Catalog:: CAT10875182
Format:: Book

65. Cleaning up stormwater runoff /

Published:: 1999
Author:: Johnson, Carolyn D.
View in NAL's Catalog:: CAT11079629
Format:: Book

66. Climatic effects of aerosols and clouds /

Published:: 1999
Author:: Kondratʹev, K. I︠A︡.
View in NAL's Catalog:: CAT11066951
Format:: Book

67. Comment concilier production porcine et protection de l'environnement? : actes du colloque, Paris, 3 mars 1999 /

Published:: 1999
View in NAL's Catalog:: CAT11062287
Format:: Book

68. Concentrations and distribution of manmade organic compounds in the Lake Tahoe Basin, Nevada and California, 1997-99 /

Published:: 1999
Author:: Lico, Michael S.
View in NAL's Catalog:: CAT11066566
Format:: Book

69. Confronting climate change in California ecological impacts on the Golden State /

Published:: 1999
View in NAL's Catalog:: CAT11063466
Format:: eBook

70. Contamination de l'eau par les pesticides dans les régions de culture de maïs et de soya au Québec : campagnes d'échantillonnage 1996, 1997 et 1998 /

Published:: 1999
Author:: Giroux, Isabelle, 1960-
View in NAL's Catalog:: CAT11105855
Format:: Book

71. Contemporary issues in animal agriculture /

Published:: 1999
Author:: Cheeke, Peter R.
View in NAL's Catalog:: CAT11089454
Format:: Book

72. Contributions by CRC Sugar researchers to the Proceedings of the Australian Society of Sugar Cane Technologists, 1996-1998 /

Published:: 1999
View in NAL's Catalog:: CAT11080398
Format:: Book

73. Critical issues in current climate policy : "hot air", multi-level emission trading registries and changes in emission commitments due to international conflicts /

Published:: 1999
Author:: Michaelowa, Axel.
View in NAL's Catalog:: CAT11068335
Format:: Book

74. Decision and finding of no Significant Impact for wildlife damage management to protect property, health and safety environmental assessment /

Published:: 1999
Author:: Oldenburg, J. Gary.
View in NAL's Catalog:: CAT30938509
Format:: Electronic

75. Decision and findling of no significant impact for wildlife hazard management at airports in Hawaii, environmental assessment

Published:: 1999
Author:: Oldenburg, J. Gary.
View in NAL's Catalog:: CAT30938538
Format:: Electronic

76. Deposition of selenium and other constituents in reservoir bottom sediment of the Solomon River Basin, north-central Kansas /

Published:: 1999
Author:: Christensen, Victoria G.
View in NAL's Catalog:: CAT11066495
Format:: Book

77. Desafíos para Uruguay : espacio agrario, espacio ambiental /

Published:: 1999
Author:: Achkar, Marcel.
View in NAL's Catalog:: CAT11076023
Format:: Book

78. Desarrollo sostenible, globalizacion y regionalismo : límites y oportunidades para un desarrollo alternativo en América Latina /

Published:: 1999
Author:: Gudynas, Eduardo, 1960-
View in NAL's Catalog:: CAT11092336
Format:: Book

79. Detailed study of selenium in glacial-lake deposits, wetlands, and biota associated with irrigation drainage in the southern Freezeout Lake area, west-central Montana, 1994-95 /

Published:: 1999
View in NAL's Catalog:: CAT10876878
Format:: Book

80. Determination of nitroaromatic, nitramine, and nitrate ester explosives in soils using GC-ECD /

Published:: 1999
Author:: Walsh, Marianne E.
View in NAL's Catalog:: CAT11083011
Format:: Book

81. The development and role of microtopography in constructed forested wetlands on phosphate-mined lands in central Florida /

Published:: 1999
Author:: Bukata, Benjamin J., 1970-
View in NAL's Catalog:: CAT11125611
Format:: Manuscript

82. La déforestation vue par les satellites l'agriculture sur brûlis en région tropical humide = Deforestation viewed from space : slash-and-burn agriculture in tropical countries /

Published:: 1999
Author:: Imbernon, Jacques.
View in NAL's Catalog:: CAT11108203
Format:: Software

83. Diamond Fork System : final supplement to the final environmental impact statement /

Published:: 1999
View in NAL's Catalog:: CAT11061189
Format:: Book

84. The dictionary of substances and their effects.

Published:: 1999
View in NAL's Catalog:: CAT11068224
Format:: Book

85. Discharge of herbicides from the Mississippi River basin to the Gulf of Mexico, 1991-97

Published:: 1999
Author:: Clark, G. M. 1958-
View in NAL's Catalog:: CAT11091360
Format:: eBook

86. Disrupting the balance : ecological impacts of pesticides in California /

Published:: 1999
Author:: Kegley, Susan E., 1957-
View in NAL's Catalog:: CAT11092485
Format:: Book

87. Distribution and transport of polychlorinated biphenyls and associated particulates in the Hayton Millpond, South Branch Manitowoc River, 1993-95 /

Published:: 1999
Author:: Steuer, Jeffrey S.
View in NAL's Catalog:: CAT11107619
Format:: Book

88. Distribution and transport of polychlorinated biphenyls and associated particulates in the Milwaukee River System, Wisconsin, 1993-95 /

Published:: 1999
Author:: Steuer, Jeffrey S.
View in NAL's Catalog:: CAT10879597
Format:: Book

89. Distribution and transport of total mercury and methylmercury in mercury-contaminated sediments in reservoirs and wetlands of the Sudbury River, east-central Massachusetts /

Published:: 1999
View in NAL's Catalog:: CAT11060040
Format:: Book

90. Distribution of trichloroethylene and geologic controls on contaminant pathways near the Royal River, McKin Superfund Site area, Gray, Maine /

Published:: 1999
View in NAL's Catalog:: CAT10979477
Format:: Book

91. Draft environmental impact statement : Wolfmann projects /

Published:: 1999
View in NAL's Catalog:: CAT10864938
Format:: Book

92. Draft environmental impact statement for the proposed Agua/Caballos projects : Carson National Forest, El Rito Ranger District.

Published:: 1999
View in NAL's Catalog:: CAT10862856
Format:: Book

93. Ecodiseño y ecoproductos /

Published:: 1999
Author:: Rieradevall, Joan.
View in NAL's Catalog:: CAT11067722
Format:: Book

94. The ecological condition of estuaries in the Gulf of Mexico /

Published:: 1999
View in NAL's Catalog:: CAT11087485
Format:: Book

95. Ecological design and health impact of large dams, canals and irrigation systems /

Published:: 1999
Author:: Jobin, William R.
View in NAL's Catalog:: CAT10878044
Format:: Book

96. Ecological design handbook : sustainable strategies for architecture, landscape architecture, interior design, and planning /

Published:: 1999
View in NAL's Catalog:: CAT11063736
Format:: Book

97. Ecological landscape design and planning : the Mediterranean context /

Published:: 1999
Author:: Makhzoumi, Jala, 1949-
View in NAL's Catalog:: CAT10876751
Format:: Book

98. Ecology and biodiversity of Indian mangroves /

Published:: 1999
Author:: Naskar, Kumudranjan.
View in NAL's Catalog:: CAT11076171
Format:: Book

99. The economic and environmental consequences of nutrient management in agriculture /

Published:: 1999
Author:: Huang, Wen-Yuan.
View in NAL's Catalog:: CAT11064832
Format:: Book

100. Ecosystem-based fishery management : a report to Congress by the Ecosystem Principles Advisory Panel.

Published:: 1999
View in NAL's Catalog:: CAT11091604
Format:: Book

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1. 1999 International Ash Utilization Symposium materials for the next millenium : October 18-20, 1999, Lexington, Kentucky, USA /

2. 1999 Update of ambient water quality criteria for ammonia

3. Acquacoltura : qualità dell'ambiente e del prodotto : Castiglione della Pescaia-Grosseto, 30 settembre-1 ottobre 1996 /

4. After the rain urban runoff /

5. Against the grain : the genetic transformation of global agriculture /

6. The agri-environmental situation and policies in the Czech Republic, Hungary and Poland.

7. Agricultura y medio ambiente /

8. Agricultura y sociedad en México : diversidad, enfoques, estudios de caso /

9. Agricultural crisis in America : a reference handbook /

10. Agriculture and the environment /

11. Agriculture and the environment : development of European Union agri-environment policy : an Agra Europe special study /

12. Agriculture waste emerges as major state, federal environmental concern.

13. Agriculture, fertilizers, and the environment /

14. AgroAmbiente

15. Alimentation mondiale 2050 : bien nourrir les hommes sans dégrader la planète : colloque organisé sous l'égide des associations Animation, mémoire, international [et] Rayonnement français, réalités internationales.

16. Alternatives to pesticides in tropical countries : sustainable agriculture--food security with food safety /

17. Ambient water quality criteria for dissolved oxygen prepared pursuant to section 2(e) of the Environment Management Act, 1981.

18. Ambient water quality guidelines (criteria) for turbidity, suspended and benthic sediments overview report.

19. Analysis of carbon isotopes, determination of ground-water age, and estimated characteristics of the contaminant source at two fuel-spill plumes, western Cape Cod, Massachusetts, 1996 /

20. Animal responses to global change in the North /

21. Animal waste lagoon water quality study : a research report by Kansas State University /

22. Application of spatially referenced regression modeling for the evaluation of total nitrogen loading in the Chesapeake Bay Watershed

23. Approaches to pesticide policy reform : building consensus for future action : a policy workshop in Hua Hin, Thailand, July 3-5, 1997 /

24. Aquaculture and the environment /

25. Aquaculture et environnement : réglementation et pratique des élevages de poissons marins : actes des journées nationales de travail, Brest, 2-3 octobre 1997 /

26. Arapahoe Basin master development plan : final environmental impact statement.

27. Areas susceptible to irrigation-induced selenium contamination of water and biota in the western United States / by Ralph L. Seiler, Joseph P. Skorupa, and Lorri A. Peltz.

28. Arsenic in drinking water /

29. Arsenic in ground water of the Willamette Basin, Oregon /

30. Arzneimittelrückstände in der Umwelt : Bestandsaufnahme und Problemdarstellung /

31. Assessing biological effects from highway-runoff constituents

32. Assessing environmental effects of the North American Free Trade Agreement (NAFTA) : an analytic framework (phase II) and issue studies.

33. Assessing the effects of fire disturbance on ecosystems : a scientific agenda for research and management /

34. Assessment of nitrate contamination of the upper aquifer in the Manatí-Vega Baja area, Puerto Rico /

35. Assessment of sources of elevated nitrate in ground water in Northwest Ada County, Idaho, using environmental isotopes /

36. Atlas raspredelenii︠a︡ ti︠a︡zhelykh metallov v obʺektakh okruzhai︠u︡shcheĭ sredy /

37. Atmospheric environmental research : critical decisions between technological progress and preservation of nature /

38. Atrazine : midwest studies provide some answers /

39. Background report on fertilizer use, contaminants, and regulations

40. Beyond Malthus : nineteen dimensions of the population challenge /

41. Beyond the green box : a conceptual framework for agricultural trade and the environment /

42. Bibliographie Umweltaspekte der Gentechnik /

43. Bibliography of recent papers in the biomedical literature on the health impacts of geologic processes and materials

44. Bibliography of surface-mine reclamation research : 1976-1993 /

45. Biennial report fiscal year 1998 and 1999 /

46. Biodiversity, conservation and sustainable development : principles and practices with Asian examples /

47. Bioenergy transport systems : life cycle assessment of selected bioenergy systems /

48. Biogeochemistry of trace elements in coal and coal combustion byproducts /

49. Biogeokhimicheskiĭ monitoring i ot︠s︡enka rezhimov funkt︠s︡ionirovanii︠a︡ agroėkosistem na tekhnogenno zagri︠a︡zni︠a︡emykh pochvakh /

50. Bioindikat︠s︡ii︠a︡ radioaktivnykh zagri︠a︡zneniĭ /

51. Biological degradation of EDTA in pulping effluents at higher pH : a laboratory study /

52. Biomass and vegetative characteristics of sawgrass grown in a tilting flume as part of a study of vegetative resistance to flow

53. Biotechnology and biosafety : a forum /

54. Biotechnology for environmental protection in the pulp and paper industry /

55. Birds and power lines : collision, electrocution and breeding /

56. Brown Creek timber sale draft environmental impact statement.

57. Cadmium in soil and plants /

58. Canal Hoya timber sale : record of decision and final environmental impact statement.

59. Car care for cleaner water.

60. Carbon monoxide /

61. Carbon offsets as an alternative to large-scale logging : a case study in Guyana's forests /

62. Carbon tetrachloride /

63. Checklist for sustainable landscape management : final report of the EU concerted action AIR3-CT93-1210 : the landscape and nature production capacity of organic/sustainable types of agriculture /

64. Chlorine-36 in water, snow, and mid-latitude glacial ice of North America : meteoric and weapons-tests production in the vicinity of the Idaho National Engineering and Environmental Laboratory, Idaho /

65. Cleaning up stormwater runoff /

66. Climatic effects of aerosols and clouds /

67. Comment concilier production porcine et protection de l'environnement? : actes du colloque, Paris, 3 mars 1999 /

68. Concentrations and distribution of manmade organic compounds in the Lake Tahoe Basin, Nevada and California, 1997-99 /

69. Confronting climate change in California ecological impacts on the Golden State /

70. Contamination de l'eau par les pesticides dans les régions de culture de maïs et de soya au Québec : campagnes d'échantillonnage 1996, 1997 et 1998 /