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1. Experience with rice in West Africa Coming full circle; farmer' participation in the development of technology

by Prakah-Asante, K | Sandhu, A.S | Spencer, D.S.C | Matlon, P | Cantrell, R | King, D | Benoit-Cattin, M | IDRC, Ottawa (Canadá) | Workshop on farmers' participation in the development and evaluation of technology Ouagadougou (Alto Volta) 20-25 Set 1983.

Material type: Article Article; Format: regular print Publisher: Ottawa (Canadá) 1984Availability: Items available for loan: Sede Central [Call number: INVES-ET E14c M433] (1).
2. Indices for measuring the sustainability and economic viability of farming systems

by Ehui, S.K | Spencer, D.S.C.

Material type: Article Article; Format: regular print Publisher: Ibadan (Nigeria) 1991Availability: Items available for loan: Sede Central [Call number: INVES-ET E16 E33 | GTZ-1292 | SM-AMPO] (1).
3. Indices for measuring the sustainability and economic viability of farming systems

by Ehui, S.K | Spencer, D.S.C.

Material type: Article Article; Format: regular print Publisher: Ibadan (Nigeria) 1991Availability: Items available for loan: Sede Central [Call number: INVES-ET E16 E33 | GTZ-1292 | SM-AMPO] (1).
4. Biological nitrogen fixation and sustainability of tropical agriculture: proceedings

by Mulongoy, K | Gueye, M | Spencer, D.S.C | IITA, Ibadan (Nigeria) | 4. International Conference of the African Association for Biological Nitrogen Fixation (AABNF) Ibadan (Nigeria) 24-28 Set 1990.

Material type: Text Text; Format: regular print Publisher: New York, N.Y. (EUA) John Willey 1992Availability: Items available for loan: Sede Central [Call number: GTZ-553] (1).