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1bibliotecaIICA
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2Biological nitrogen fixation in farming systems of the Tropics Biological nitrogen fixation in farming systems of the Tropicsby 45314 Ayanaba, A., 61250 Dart, P.J. eds., 38452 Symposium on Biological Nitrogen Fixation in Farmer Systems of the Tropics Ibadan (Nigeria) Oct 1975
Published 1977bibliotecaIICA -
3by 61248 Dart, P., 93998 Meyers, L.R., 1278 Banco Mundial, Washington, D.C. (EUA), 34022 9. Agriculture Sector Symposium (EUA) 10-11 Ene 1989
Published 1989Texto bibliotecaIICA