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1Texto bibliotecaIICA
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2by MacKenzie, J.J. (ed.), World Resources Inst., Washington, DC (USA) eng, El-Ashry, M.T. (ed.)
Published 1989Texto bibliotecaFAO IT -
3by MacKenzie, J.J., World Resources Inst., Washington, DC (USA) eng, Dower, R.C., Chen, D.D.T.
Published 1992Texto bibliotecaFAO IT