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1Digital revistaSCIELO
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2
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3Texto bibliotecaFAO IT
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4by Bulkan, J., Hajjar, R., Hardcastle, P., Assembe-Mvondo, S., Eba'a Atyi, R., Humphreys, D., Maryudi, A.
Published 2010Book Chapter bibliotecaCGIAR -
5by Burley, Jeffery, Armitage, F. B., Barnes, R. D., Gibson, G. L., Hardcastle, P. D., Huguet, L., Plumptre, R.A., Wood, Peter J.
Published 1989Libro bibliotecaINFOR CL