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1Digital revistaSCIELO
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2Digital revistaSCIELO
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3by De Waal, H.O., Zimbabwe Society for Animal Production, Harare (Zimbabwe) eng, Combrinck, W.J., Howard, M.D., Fouche, H.J., Holness, D.H. (ed.), FAO, Harare (Zimbabwe). Subregional Office for Southern and East Africa eng
Published 2000Texto bibliotecaFAO IT