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Wildland conservation in Central America. Facets of wildland conservation in middle America
(CATIE, Turrialba (Costa Rica), 1978)
Agricultural training in the Central American Isthmus; a proposal submitted to the Kellogg Foundation
(Centro Agronómico Tropical de Investigación y Enseñanza (CATIE), Turrialba (Costa Rica), 1978)
Provisional list of insect and mite pests of food crops in Central America.
(Centro Agronómico Tropical de Investigación y Enseñanza, Turrialba (Costa Rica)., 1978)
A farming system research approach for small farms of Central America.
(Centro Agronómico Tropical de Investigación y Enseñanza, Turrialba (Costa Rica)., 1978)