Tres especies de zapote en América Tropical (Pouteria spp.): Manual de campo para extensionistas y fruticultores
Law and policy of relevance to the management of plant genetic resources: Learning module with review of regional policy instruments, developments and trends - 2nd edition
Crop genetic resources - the conservation of difficult material: Proceedings of an international workshop, 8-11 September 1980, University of Reading, U.K.