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1by Lamin, A.S., Workshop on the Role of Extension in Environmental Management and Agriculture eng 16 May 1983 Freetown (Sierra Leone), Khalu, I.A.
Published 1983Texto bibliotecaFAO IT -
2by Birchall, C.J., FAO, Rome (Italy) eng, Gordon, O.L.A., Lamin, A.S., Alkire, W.K., Hawker-Parker, H.
Published JulTexto bibliotecaFAO IT