Producción rural en México : alternativas ecológicas
1989
Toledo, Victor M. |
Agriculture
The development of irrigated farming in the Sahel : irrigation policy limitations and farmer strategies - synthesis report
1991
Violet, J. Aviron |
Ido, B. D. |
Soumaila, A. |
van Steekelenburg, P. N. G. |
Waldstein, A. |
Soil - geomorphic relationships in the vicinity of Niamey, Niger
1989
Wilding, L. P. |
Daniels, Ray |
The role of energy in irrigated agriculture in Niger
1987
Kohler, Daniel F. |
Integrating environmental issues into a strategy for sustainable agricultural development : the case of Mozambique
1991
Dejene, Alemneh |
Olivares, Jose |
The environmental impact of agriculture in Ethiopia
1978
Kuru, Assefa |
La Isla de Margarita y sus problemas
1949
Budowski, Gerardo |