Format: Book / Publish Date: 1997 / Topic: Environmental aspects

1. Particle toxicity.

Published:: 1997
View in NAL's Catalog:: CAT31077190
Format:: Book

2. Refugees and the environment : caring for the future.

Published:: 1997
View in NAL's Catalog:: CAT30998000
Format:: Book

3. Roads and the environment : a handbook /

Published:: 1997
View in NAL's Catalog:: CAT30997364
Format:: Book

4. Achieving broad-based sustainable development : governance, environment, and growth with equity /

Published:: 1997
Author:: Weaver, James H.
View in NAL's Catalog:: CAT30995970
Format:: Book

5. Helicopter landings in wilderness final environmental impact statement.

Published:: 1997
View in NAL's Catalog:: CAT30987072
Format:: Book

6. Fostering industry-initiated environmental protection efforts /

Published:: 1997
View in NAL's Catalog:: CAT30948417
Format:: Book

7. Resource evaluation of the Charlotte Harbor addition /

Published:: 1997
View in NAL's Catalog:: CAT30941084
Format:: Book

8. In defence of land and livelihood /

Published:: 1997
Author:: Faris Ahmed.
View in NAL's Catalog:: CAT30940519
Format:: Book

9. Still with us, acidification & air pollution /

Published:: 1997
Author:: Elvingson, Per.
View in NAL's Catalog:: CAT30940099
Format:: Book

10. Population, economic development, and the environment /

Published:: 1997
View in NAL's Catalog:: CAT30939905
Format:: Book

11. Untersuchungen zum Verlagerungsverhalten ausgewählter Herbizide in Gleiskörpern /

Published:: 1997
Author:: Pfeffer, Michael.
View in NAL's Catalog:: CAT30939597
Format:: Book

12. Laju degradasi beberapa produk fungisida dithiokarbamat pada tanaman bawang putih varietas sembalun /

Published:: 1997
Author:: Surya Hadi.
View in NAL's Catalog:: CAT30933854
Format:: Book

13. Libro verde : elementos para una política agroambiental en el Cono Sur /

Published:: 1997
View in NAL's Catalog:: CAT30927801
Format:: Book

14. Fiziologo-geneticheskie aspekty ustoĭchivosti rasteniĭ k ti︠a︡zhelym metallam : analiticheskiĭ obzor /

Published:: 1997
Author:: Barsukova, V. S.
View in NAL's Catalog:: CAT30914999
Format:: Book

15. Dojōken to chikyū kankyō mondai /

Published:: 1997
View in NAL's Catalog:: CAT30914074
Format:: Book

16. RCA III influence of social trends on agricultural natural resources : politics and the environment.

Published:: 1997
View in NAL's Catalog:: CAT11139042
Format:: Book

17. Hydrologic, sedimentologic, and chemical data describing surficial bed sediments and water in the navigation pools of the Upper Mississippi River, July 1991-April 1992

Published:: 1997
View in NAL's Catalog:: CAT11135279
Format:: Book

18. Fire-induced water-repellent soils an annotated bibliography /

Published:: 1997
Author:: Kalendovsky, Mary A.
View in NAL's Catalog:: CAT11133181
Format:: Book

19. Kajian pengaruh pestisida terhadap perombakan bahan organik seresah tanaman hutan /

Published:: 1997
Author:: Suntoro.
View in NAL's Catalog:: CAT11123784
Format:: Book

20. Pathogens excreted by livestock and transmitted to humans through water /

Published:: 1997
Author:: Atwill, Edward R.
View in NAL's Catalog:: CAT11128960
Format:: Book

21. The Miombo Network : framework for a terrestrial transect study of land-use and land-cover change in the miombo ecosystems of central Africa : conclusions of the Miombo Network Workshop, Zomba, Malawi, December 1995 /

Published:: 1997
View in NAL's Catalog:: CAT10872509
Format:: Book

22. Use of stable isotopes of carbon, nitrogen, and sulfur to identify sources of nitrogen in surface waters in the lower Susquehanna River Basin, Pennsylvania /

Published:: 1997
Author:: Cravotta, Charles A.
View in NAL's Catalog:: CAT11125878
Format:: Book

23. Potensi tanaman padi sebagai bioindikator cemaran logam berat timbal (Pb) di daerah Yogyakarta : laporan penelitian /

Published:: 1997
Author:: Sudaryadi, Ignatius.
View in NAL's Catalog:: CAT11122263
Format:: Book

24. Pertumbuhan karang hermatypic akibat pemanasan global di perairan Indonesia : studi pola pertumbuhan karang hermatypic masif dengan metode sklerokronologi : laporan penelitian /

Published:: 1997
Author:: Hadi, Susilo.
View in NAL's Catalog:: CAT11122262
Format:: Book

25. Welcome to the CERI 1997 Climate Change Conference : setting the stage : Canada's negotiating position on climate change, September 4-5, 1997, The Westin Hotel, Calgary, Alberta.

Published:: 1997
View in NAL's Catalog:: CAT11123188
Format:: Book

26. Impact des activites des Points d'Étude Système (PES) de l'IDESSA dans le Centre-Ouest de la Côte d'Ivoire /

Published:: 1997
View in NAL's Catalog:: CAT11122947
Format:: Book

27. Résidus d'hexazinone dans l'eau et les sédiments à la suite de traitements réalisés de 1989 à 1994 en milieu forestier /

Published:: 1997
Author:: Legris, Jean.
View in NAL's Catalog:: CAT11122439
Format:: Book

28. Plano de Conservação da Bacia do Alto Paraguai-PCBAP /

Published:: 1997
View in NAL's Catalog:: CAT30884737
Format:: Book

29. Allevamenti e ambiente /

Published:: 1997
Author:: Rocca, G.
View in NAL's Catalog:: CAT10836899
Format:: Book

30. Modelli agricoli e impatto ambientale : valutazioni aziendali e territoriali /

Published:: 1997
View in NAL's Catalog:: CAT10836778
Format:: Book

31. The effect of ecological disturbance caused by livestock grazing on the ecology, morphology, physiology, and behavior of the rainbow grasshopper, Dactylotum variegatum /

Published:: 1997
Author:: DeBano, Sandra Jean, 1964-
View in NAL's Catalog:: CAT11114915
Format:: Book

32. Pengaruh pembalakan mekanis terhadap kerusakan tegakan tinggal di aeral HPH PT. Bengkulutama Raya Timber, Bengkulu : laporan penelitian /

Published:: 1997
Author:: Suhartoyo, Hery.
View in NAL's Catalog:: CAT11112069
Format:: Book

33. Ground-level ozone and its precursors, 1980-1993 : report of the Data Analysis Working Group.

Published:: 1997
View in NAL's Catalog:: CAT11109703
Format:: Book

34. Projet Noranda Phase III : effets des réductions d'émissions de SO₂ sur la qualité de l'eau des lacs de l'ouest québécois /

Published:: 1997
Author:: Dupont, Jacques, 1956-
View in NAL's Catalog:: CAT11068833
Format:: Book

35. Agricultura, meio ambiente e sustentabilidade do cerrado brasileiro /

Published:: 1997
View in NAL's Catalog:: CAT11107474
Format:: Book

36. Pesticides industry sales and usage : 1994 and 1995 market estimates /

Published:: 1997
Author:: Aspelin, Arnold L. 1937-
View in NAL's Catalog:: CAT11097728
Format:: Book

37. California agriculture : issues and challenges /

Published:: 1997
View in NAL's Catalog:: CAT11105045
Format:: Book

38. Contamination de l'eau par les pesticides dans les régions de culture intensive du maïs au Québec : campagnes d'échantillonnage de 1994 et 1995 /

Published:: 1997
Author:: Giroux, Isabelle, 1960-
View in NAL's Catalog:: CAT11069445
Format:: Book

39. Forest practices water quality audit, 1996 /

Published:: 1997
View in NAL's Catalog:: CAT11103860
Format:: Book

40. Climate protection policies : can we afford to delay? /

Published:: 1997
Author:: Austin, Duncan.
View in NAL's Catalog:: CAT11103845
Format:: Book

41. The regional impacts of climate change : : an assessment of vulnerability : summary for policymakers /

Published:: 1997
View in NAL's Catalog:: CAT11102878
Format:: Book

42. Proposal to study economic and environmental benefits of reducing soil erosion in Albania /

Published:: 1997
Author:: Bockheim, James G.
View in NAL's Catalog:: CAT11100553
Format:: Book

43. Controlling wildlife damage in direct seeding systems.

Published:: 1997
Author:: Bourne, John.
View in NAL's Catalog:: CAT11098667
Format:: Book

44. Floricultura y medio ambiente : la experiencia Colombiana /

Published:: 1997
View in NAL's Catalog:: CAT11069383
Format:: Book

45. South Asian Regional Workshop on Regional Land Cover Changes and Sustainable Agriculture in South Asia /

Published:: 1997
View in NAL's Catalog:: CAT11093506
Format:: Book

46. Pest and pesticide use assessment survey for Florida dairy cattle, 1994 /

Published:: 1997
Author:: Cilek, J. E.
View in NAL's Catalog:: CAT11093075
Format:: Book

47. Private costs and benefits of pesticide minimisation : final report, prepared for Department of the Environment (Environmental Protection Economics) /

Published:: 1997
View in NAL's Catalog:: CAT11091602
Format:: Book

48. International Symposium on Salt-Affected Lagoon Ecosystems : ISSALE-95, Valencia, Spain 18-25 September 1995 /

Published:: 1997
View in NAL's Catalog:: CAT11087665
Format:: Book

49. Approaches to ecologically based forest management on private lands /

Published:: 1997
Author:: Kotar, John.
View in NAL's Catalog:: CAT11083185
Format:: Book

50. Environmental planning tools and techniques : linking land use to water quality through community-based decision making /

Published:: 1997
Author:: Maguire, Todd.
View in NAL's Catalog:: CAT11064864
Format:: Book

51. Basin Creek : record of decision.

Published:: 1997
View in NAL's Catalog:: CAT11082293
Format:: Book

52. Whole ecosystem nitrogen manipulation : review study /

Published:: 1997
View in NAL's Catalog:: CAT11081026
Format:: Book

53. Manure storage & treatment alternatives /

Published:: 1997
View in NAL's Catalog:: CAT11077869
Format:: Book

54. Community relations module /

Published:: 1997
View in NAL's Catalog:: CAT11080304
Format:: Book

55. Pollution prevention strategies module /

Published:: 1997
View in NAL's Catalog:: CAT11077872
Format:: Book

56. Composting module /

Published:: 1997
View in NAL's Catalog:: CAT11077871
Format:: Book

57. Swine odor & emissions from pork production /

Published:: 1997
View in NAL's Catalog:: CAT11077870
Format:: Book

58. Umweltfibel der Forstwirtschaft /

Published:: 1997
View in NAL's Catalog:: CAT11069468
Format:: Book

59. Ėkonomicheskie problemy povyshenii︠a︡ ėffektivnosti prirodopolʹzovanii︠a︡ v APK : voprosy teorii i metodologii /

Published:: 1997
Author:: Belousov, A. I.
View in NAL's Catalog:: CAT11076988
Format:: Book

60. Economics research and education priorities for an efficient and sustainable food system.

Published:: 1997
View in NAL's Catalog:: CAT11076643
Format:: Book

61. Landnutzung und umweltgerechte Entwicklung ländlicher Räume : zwei neuere Gutachten auf dem Prüfstand : Verhandlungen der Öffentlichen Arbeitstagung am 14.02.1997 in Bonn-Röttgen /

Published:: 1997
View in NAL's Catalog:: CAT11076364
Format:: Book

62. Reservas da biosfera e reservas extrativistas : conservação da biodiversidade e ecodesenvolvimento /

Published:: 1997
View in NAL's Catalog:: CAT10858768
Format:: Book

63. Agricoltura e ambiente : confronto fra tecniche a differente intensità di impatto /

Published:: 1997
View in NAL's Catalog:: CAT11069117
Format:: Book

64. Large dams : learning from the past, looking at the future : workshop proceedings, Gland, Switzerland, April 11-12, 1997 /

Published:: 1997
View in NAL's Catalog:: CAT11062614
Format:: Book

65. Naukovi osnovy ekonomichnoï adaptat︠s︡iï silʹsʹkoho hospodarstva do navkolyshnʹoho seredovyschha /

Published:: 1997
Author:: Kalinchyk, M. V.
View in NAL's Catalog:: CAT11066717
Format:: Book

66. Efectos del aprovechamiento forestal y el tratamiento silvicultural en un bosque húmedo del noreste de Costa Rica : cambios en la riqueza y composición de la vegetación /

Published:: 1997
View in NAL's Catalog:: CAT11066308
Format:: Book

67. Natural resources & the 21st century : where are we headed? / [compiled by Bo Shelby and Sandie Arbogast].

Published:: 1997
View in NAL's Catalog:: CAT11067063
Format:: Book

68. Recreation ecology : the ecological impact of outdoor recreation and ecotourism /

Published:: 1997
Author:: Liddle, M. J.
View in NAL's Catalog:: CAT11065852
Format:: Book

69. Greening the government : a guide to implementing Executive Order 12873.

Published:: 1997
View in NAL's Catalog:: CAT11064623
Format:: Book

70. Experiences of advocacy in environment and development /

Published:: 1997
View in NAL's Catalog:: CAT11061436
Format:: Book

71. Techniczne, ekonomiczne i przyrodnicze aspekty zrywki drewna w sosnowych drzewostanach przedrębnych /

Published:: 1997
Author:: Porter, Bolesław.
View in NAL's Catalog:: CAT10874866
Format:: Book

72. Manure management in Wisconsin : results of the 1995 Wisconsin Farmer Poll /

Published:: 1997
Author:: Jackson-Smith, Douglas B.
View in NAL's Catalog:: CAT11063363
Format:: Book

73. Maximizing the environmental benefits per dollar expended : an economic interpretation and review of agricultural environmental benefits and costs /

Published:: 1997
Author:: Poe, Gregory L.
View in NAL's Catalog:: CAT10877153
Format:: Book

74. Tratado de fertilización /

Published:: 1997
Author:: Domínguez Vivancos, Alonso.
View in NAL's Catalog:: CAT10863856
Format:: Book

75. Cats and wildlife : a conservation dilemma /

Published:: 1997
Author:: Coleman, John S.
View in NAL's Catalog:: CAT10879334
Format:: Book

76. Gestión medioambiental y contabilidad : una aplicación al sector del aceite de oliva /

Published:: 1997
Author:: Cámara de la Fuente, Macario.
View in NAL's Catalog:: CAT10874811
Format:: Book

77. A shared reponsibility for food production and the environment : the 6th International Conference, Cambridge, UK, 10th-12th December 1997.

Published:: 1997
View in NAL's Catalog:: CAT10874371
Format:: Book

78. La cuestión ganadera y la deforestación : viejos y nuevos problemas en el trópico y Chiapas /

Published:: 1997
Author:: Villafuerte Solís, Daniel.
View in NAL's Catalog:: CAT10874351
Format:: Book

79. A pilot study for ambient toxicity testing in Chesapeake Bay : year 4 report.

Published:: 1997
View in NAL's Catalog:: CAT10873895
Format:: Book

80. Manual de formación forestal y ambiental : legislación, aprovechamientos forestales y conservación del medio natural /

Published:: 1997
Author:: Trujillo Vera, Marcelino.
View in NAL's Catalog:: CAT10864622
Format:: Book

81. Species and plant community accounts for identified wildlife.

Published:: 1997
View in NAL's Catalog:: CAT10871072
Format:: Book

82. Sustainable community development : principles and concepts /

Published:: 1997
Author:: Maser, Chris.
View in NAL's Catalog:: CAT10828433
Format:: Book

83. Future directions : a vision of information technology for field conservationists.

Published:: 1997
View in NAL's Catalog:: CAT10872068
Format:: Book

84. Phosphorus release and retention potential of constructed wetlands in the Emeralda Marsh conservation area /

Published:: 1997
View in NAL's Catalog:: CAT10863740
Format:: Book

85. Environmental risk assessment of a Lake Apopka muck farm wetlands restoration /

Published:: 1997
View in NAL's Catalog:: CAT10863739
Format:: Book

86. Código de buenas prácticas agrarias de Navarra.

Published:: 1997
View in NAL's Catalog:: CAT10865234
Format:: Book

87. Potential impacts on the Australian electricity sector of proposed international commitments on greenhouse gas emissions /

Published:: 1997
Author:: Matthewson, Marny.
View in NAL's Catalog:: CAT10871044
Format:: Book

88. Proceedings of the 2nd International PhD Seminar on Investigations of Environmental Impacts on River Basin and/or Flood Plain Management : Budapest, Hungary, 5-8 July, 1997 /

Published:: 1997
View in NAL's Catalog:: CAT10870160
Format:: Book

89. Ot︠s︡enka vlii︠a︡nii︠a︡ pestit︠s︡idov na ėkologicheskoe sostoi︠a︡nie Azovo-Chernomorskogo basseĭna : na primere severo-zapadnogo shelʹfa Chernogo mori︠a︡ /

Published:: 1997
Author:: Osokina, N. P.
View in NAL's Catalog:: CAT10864186
Format:: Book

90. Ecological costs of economic globalisation : the Indian experience /

Published:: 1997
Author:: Shiva, Vandana.
View in NAL's Catalog:: CAT10863579
Format:: Book

91. Recent advances in ecobiological research /

Published:: 1997
View in NAL's Catalog:: CAT10862454
Format:: Book

92. Belorusskoe selo v 70-90-e gody: migrat︠s︡ii︠a︡ naselenii︠a︡, trudovye resursy /

Published:: 1997
Author:: Sakovich, V. S.
View in NAL's Catalog:: CAT10862345
Format:: Book

93. Institutional economics, the theory of property rights, economic development and the environment /

Published:: 1997
Author:: Prasad, Biman C.
View in NAL's Catalog:: CAT10861538
Format:: Book

94. Perceptions on environmental issues relating to agriculture : a contrast between rural and urban residents /

Published:: 1997
Author:: Sutton, Glen Edward.
View in NAL's Catalog:: CAT10869887
Format:: Book

95. La restauración de la cubierta vegetal en la Comunidad Valencia /

Published:: 1997
View in NAL's Catalog:: CAT10860373
Format:: Book

96. Land degradation in Tanzania : perception from the village /

Published:: 1997
View in NAL's Catalog:: CAT10861188
Format:: Book

97. Record of decision : final supplement to the final environmental impact statement : Vail category III ski area development /

Published:: 1997
View in NAL's Catalog:: CAT10860737
Format:: Book

98. Record of decision for the Illinois Creek timber sale final environmental impact statement and supplement.

Published:: 1997
View in NAL's Catalog:: CAT10860538
Format:: Book

99. Final supplement to the final environmental impact statement for Vail category III ski area development /

Published:: 1997
View in NAL's Catalog:: CAT10860421
Format:: Book

100. Advancing sustainable development : the World Bank and Agenda 21.

Published:: 1997
View in NAL's Catalog:: CAT10852210
Format:: Book

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1. Particle toxicity.

2. Refugees and the environment : caring for the future.

3. Roads and the environment : a handbook /

4. Achieving broad-based sustainable development : governance, environment, and growth with equity /

5. Helicopter landings in wilderness final environmental impact statement.

6. Fostering industry-initiated environmental protection efforts /

7. Resource evaluation of the Charlotte Harbor addition /

8. In defence of land and livelihood /

9. Still with us, acidification & air pollution /

10. Population, economic development, and the environment /

11. Untersuchungen zum Verlagerungsverhalten ausgewählter Herbizide in Gleiskörpern /

12. Laju degradasi beberapa produk fungisida dithiokarbamat pada tanaman bawang putih varietas sembalun /

13. Libro verde : elementos para una política agroambiental en el Cono Sur /

14. Fiziologo-geneticheskie aspekty ustoĭchivosti rasteniĭ k ti︠a︡zhelym metallam : analiticheskiĭ obzor /

15. Dojōken to chikyū kankyō mondai /

16. RCA III influence of social trends on agricultural natural resources : politics and the environment.

17. Hydrologic, sedimentologic, and chemical data describing surficial bed sediments and water in the navigation pools of the Upper Mississippi River, July 1991-April 1992

18. Fire-induced water-repellent soils an annotated bibliography /

19. Kajian pengaruh pestisida terhadap perombakan bahan organik seresah tanaman hutan /

20. Pathogens excreted by livestock and transmitted to humans through water /

21. The Miombo Network : framework for a terrestrial transect study of land-use and land-cover change in the miombo ecosystems of central Africa : conclusions of the Miombo Network Workshop, Zomba, Malawi, December 1995 /

22. Use of stable isotopes of carbon, nitrogen, and sulfur to identify sources of nitrogen in surface waters in the lower Susquehanna River Basin, Pennsylvania /

23. Potensi tanaman padi sebagai bioindikator cemaran logam berat timbal (Pb) di daerah Yogyakarta : laporan penelitian /

24. Pertumbuhan karang hermatypic akibat pemanasan global di perairan Indonesia : studi pola pertumbuhan karang hermatypic masif dengan metode sklerokronologi : laporan penelitian /

25. Welcome to the CERI 1997 Climate Change Conference : setting the stage : Canada's negotiating position on climate change, September 4-5, 1997, The Westin Hotel, Calgary, Alberta.

26. Impact des activites des Points d'Étude Système (PES) de l'IDESSA dans le Centre-Ouest de la Côte d'Ivoire /

27. Résidus d'hexazinone dans l'eau et les sédiments à la suite de traitements réalisés de 1989 à 1994 en milieu forestier /

28. Plano de Conservação da Bacia do Alto Paraguai-PCBAP /

29. Allevamenti e ambiente /

30. Modelli agricoli e impatto ambientale : valutazioni aziendali e territoriali /

31. The effect of ecological disturbance caused by livestock grazing on the ecology, morphology, physiology, and behavior of the rainbow grasshopper, Dactylotum variegatum /

32. Pengaruh pembalakan mekanis terhadap kerusakan tegakan tinggal di aeral HPH PT. Bengkulutama Raya Timber, Bengkulu : laporan penelitian /

33. Ground-level ozone and its precursors, 1980-1993 : report of the Data Analysis Working Group.

34. Projet Noranda Phase III : effets des réductions d'émissions de SO₂ sur la qualité de l'eau des lacs de l'ouest québécois /

35. Agricultura, meio ambiente e sustentabilidade do cerrado brasileiro /

36. Pesticides industry sales and usage : 1994 and 1995 market estimates /

37. California agriculture : issues and challenges /

38. Contamination de l'eau par les pesticides dans les régions de culture intensive du maïs au Québec : campagnes d'échantillonnage de 1994 et 1995 /

39. Forest practices water quality audit, 1996 /

40. Climate protection policies : can we afford to delay? /

41. The regional impacts of climate change : : an assessment of vulnerability : summary for policymakers /

42. Proposal to study economic and environmental benefits of reducing soil erosion in Albania /

43. Controlling wildlife damage in direct seeding systems.

44. Floricultura y medio ambiente : la experiencia Colombiana /

45. South Asian Regional Workshop on Regional Land Cover Changes and Sustainable Agriculture in South Asia /

46. Pest and pesticide use assessment survey for Florida dairy cattle, 1994 /

47. Private costs and benefits of pesticide minimisation : final report, prepared for Department of the Environment (Environmental Protection Economics) /

48. International Symposium on Salt-Affected Lagoon Ecosystems : ISSALE-95, Valencia, Spain 18-25 September 1995 /

49. Approaches to ecologically based forest management on private lands /

50. Environmental planning tools and techniques : linking land use to water quality through community-based decision making /

51. Basin Creek : record of decision.

52. Whole ecosystem nitrogen manipulation : review study /

53. Manure storage & treatment alternatives /

54. Community relations module /

55. Pollution prevention strategies module /

56. Composting module /

57. Swine odor & emissions from pork production /

58. Umweltfibel der Forstwirtschaft /

59. Ėkonomicheskie problemy povyshenii︠a︡ ėffektivnosti prirodopolʹzovanii︠a︡ v APK : voprosy teorii i metodologii /

60. Economics research and education priorities for an efficient and sustainable food system.

61. Landnutzung und umweltgerechte Entwicklung ländlicher Räume : zwei neuere Gutachten auf dem Prüfstand : Verhandlungen der Öffentlichen Arbeitstagung am 14.02.1997 in Bonn-Röttgen /

62. Reservas da biosfera e reservas extrativistas : conservação da biodiversidade e ecodesenvolvimento /

63. Agricoltura e ambiente : confronto fra tecniche a differente intensità di impatto /

64. Large dams : learning from the past, looking at the future : workshop proceedings, Gland, Switzerland, April 11-12, 1997 /

65. Naukovi osnovy ekonomichnoï adaptat︠s︡iï silʹsʹkoho hospodarstva do navkolyshnʹoho seredovyschha /

66. Efectos del aprovechamiento forestal y el tratamiento silvicultural en un bosque húmedo del noreste de Costa Rica : cambios en la riqueza y composición de la vegetación /

67. Natural resources & the 21st century : where are we headed? / [compiled by Bo Shelby and Sandie Arbogast].

68. Recreation ecology : the ecological impact of outdoor recreation and ecotourism /

69. Greening the government : a guide to implementing Executive Order 12873.