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The nature of self-incompatibility
(CATIE, 1977)
National, bilateral and multilateral agroforestry projects in Central and South America
(CATIE, Turrialba (Costa Rica), 1979)
Milk and beef production systems for the small farmers using crop derivatives. 1977 Progress reports project
(Centro Agronómico Tropical de Investigación y Enseñanza (CATIE), Turrialba (Costa Rica). PROGRAMA DE BOVINOS Y ESPECIES MENORES, 1978)
A farming system research approach for small farms of Central America.
(Centro Agronómico Tropical de Investigación y Enseñanza, Turrialba (Costa Rica)., 1978)