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 / edited by Stuart Hill, Pierre Ott.
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| Format: | Book |
| Language: | English |
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Basel, Switzerland :
Birkhäuser Verlag,
1982
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