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Titolo |
Organic farming : current technology and its role in a sustainable agriculture : proceedings of a symposium / / sponsored by Division S-3, S-4, S-6, S-8, and A-5 of the American Society of Agronomy, Crop Science Society of America, and the Soil Science Society of America in Atlanta, Ga., 29 Nov.-3 Dec. 1981 ; editorial committee, D.F. Bezdicek, chm. ... [et al.] |
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