Resistencia de Phaseolus vulgaris L. silvestre y progenies con frijol cultivado al gorgojo comun Acanthoscelides obtectus (Say) a nivel de campo y laboratorio
Participation of small farmers in technology assessment : Experiences with beans (Phaseolus vulgaris L.) and rock phosphate
Economía, programa de pastos tropicales. Avances 1984 : Revision interna del Programa. Noviembre 19-24, 1984.
The need for, structure, and possible functions of a geographic data-base in the process of technology transfer to the small farmer