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1by Sison, J.F., Department of Environment and Natural Resources, Quezon City (Philippines). Forest Management Bureau eng
Published ndTexto bibliotecaFAO IT -
2by Rosegrant, M.W. 176404, International Food Policy Research Inst., Washington, DC (USA) eng, Gonzales, L.A., Bouis, H.E., Sison, J.F.
Published 1987Texto bibliotecaFAO IT