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1. Basic technics in ecological farming : papers presented at the 2nd international conference held by the IFOAM, Montreal, October 1-5, 1978 ; The Maintenance of soil fertility : exposés présentés à la 3 ème conférence internationale organisée par IFOAM, Bruxelles, du 3 au 5 Septembre 1980 /

Published:: 1982
View in NAL's Catalog:: CAT83784509
Format:: Book

2. Ecology and integrated farming systems : proceedings of the 13th Long Ashton International Symposium /

Published:: 1995
View in NAL's Catalog:: CAT10704721
Format:: Book

3. Environmentally sound agriculture : selected papers from the Fourth International Conference of the International Federation of Organic Agriculture Movements, Cambridge, Massachusetts, August 18 to 20, 1982 /

Published:: 1983
View in NAL's Catalog:: CAT85817575
Format:: Book