Brachiaria. A report to CIAT, Colombia, on the species and specimens held in the germplasm collection
Recolección de germoplasma de fríjol Phaseolus spp. L. en la región Andina del Centro de Colombia en los departamentos de Cundinamarca y Boyacá
Land use studies: Reconciling the Dynamics of Agriculture with the Environment Annual report 1993 Project PE-4
A proposal for creating an international institute for agricultural research and training to serve the lowland tropical regions of the Americas