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Exploring the role of diversity in sustainable agriculture : proceedings of a symposium ...
editors: Richard Olson, Charles Francis, ...
Bok Engelsk 1995
Crop improvement for sustainable agriculture
edited by M. Brett Callaway and Charles A...
Bok Engelsk 1993
Sustainable agriculture in temperate zones
edited by Charles A. Francis, Cornelia Bu...
Bok Engelsk 1990
Internal resources for sustainable agriculture
Francis, Charles A.
Bok Engelsk 1980