Livestock and sustianable nutrient cycling in mixed farming systems of sub-Saharan Africa.Volume I:Conference summary.

POWELL, J.M.

Livestock and sustianable nutrient cycling in mixed farming systems of sub-Saharan Africa.Volume I:Conference summary. - Addis-Abeba (Ethiopia). International Livestock Centre for Africa:(I.L.C.A.). 1995 - VII-50p. - I .

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