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1by Godwin, D.C., Thornton, Philip K., Jones, J.W., Singh, U., Jagtap, S.S., Ritchie, J.T.
Published 1991Conference Proceedings bibliotecaCGIAR -
2by Hunt, L.A., FAO, Rome (Italy). Sustainable Development Dept. eng, Jones, J.W., Hoogenboom, G., Godwin, D.C., Singh, U.
Published FebTexto bibliotecaFAO IT