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3Texto bibliotecaFAO IT
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4by Smallwood, D.M., Economic Research Service, Washington, DC (USA). Commodity Economics Div. eng, Blaylock, J.R., Harris, J.M.
Published 1987Texto bibliotecaFAO IT -
5by Walker, J.C.F, Butterfield, B.G. Co autor, Harris, J.M co autor, Langrish, T.A.G. Co autor, Uprichard, J.M.
Published 1993Texto bibliotecaUNAM