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Phytopractices In Tropical Regions: A Preliminary Survey Of Traditional Crop Improvement Techniques. Man And The Biosphere Program Project. Paris: United Nations Educational, Scientific and Cultural Organization (UNESCO). http://www.worldcat.org/oclc/21010205.
. 1989. Conference Paper
“Notes And Reflections On The Workshop On Farmers And Agricultural Research: Complementary Methods”. In Paper Presented At Ids Workshop On Farmers And Agricultural Research: Complementary Methods, July 26-31, 1987, University Of Sussex. University of Sussex: Brighton, UK.
. 1987. “The Role Of Trees In Agroforestry: Some Comments”. In Plant Research And Agroforestry: Proceedings Of A Consultative Meeting Held In Nairobi, 8 To 15 April 1981, 257-270. Nairobi, Kenya: International Council for Research in Agroforestry. http://www.worldcat.org/oclc/11698847.
. 1983. “Village-Forest-Gardens In West Java”. In Plant Research And Agroforestry: Proceedings Of A Consultative Meeting Held In Nairobi, 8 To 15 April 1981, 13-24. Nairobi, Kenya: International Council for Research in Agroforestry. http://www.worldcat.org/oclc/11698847.
. 1983. Report
“Los Agricultores De Yurimaguas: Uso De La Tierra Y Estrategias De Cultivo En La Selva Peruana”. Centro De Investigación Y Promoción Amazónica Documento. Centro de Investigación y Promoción Amazónica: Lima, Peru.
. 1989.