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. 1990. Indigenous Technical Knowledge On Private Tree Management: Final Draft. Ames, IA: Iowa State University. http://www.worldcat.org/oclc/30260806.
. 1990. “Institutional Incompatibility In Community Forestry: The Case Of Nepal”. In Community Organizations And Government Bureaucracies In Social Forestry, 11-25. Honolulu, Hawaii: Environment and Policy Institute, East-West Center. http://www.worldcat.org/oclc/23804282.
. 1990. “International Association For The Study Of Common Property: "Designing Sustainability On The Commons," 27-30 September 1990, Duke University, Durham, North Carolina”. In . Durham, NC: Duke University. https://dlc.dlib.indiana.edu/dlc/browse?value=Designing+Sustainability+on+the+Commons%2C+the+First+Biennial+Conference+of+the+International+Association+for+the+Study+of+Common+Property&type=conference.
. 1990. “Introduction To Agroforestry”. In Agroforestry: Classification And Management, 1-30. New York: Wiley. http://www.worldcat.org/oclc/19222486.
. 1990. “Iterative Increase Of Economic Tree Species In Managed Swidden-Fallows Of The Amazon”. Agroforestry Systems 11 (2): 175-197. doi:10.1007/BF00838727. https://doi.org/10.1007/BF00838727.
. 1990. Joint Management For Forest Lands: Experiences From South Asia. New Delhi, India: Ford Foundation. http://www.worldcat.org/oclc/24551289.
. 1990. Keepers Of The Forest: Land Management Alternatives In Southeast Asia. Kumarian Press Library Of Management For Development. Manilia, Philipinnes; West Hartford, CT: Ateneo De Manila University Press; Kumarian Press. http://www.worldcat.org/oclc/20263005.
. 1990. Land And Water Strategy, The Process Begins: Workbook On Soil. [Winnipeg, MB]: Province of Manitoba [Natural Resources, Water Resources Branch]. http://www.worldcat.org/oclc/184878384.
. 1990. “Land Use, Soil Loss, And Sustainable Agriculture In Rwanda”. Human Ecology 18 (2): 147-161. doi:10.1007/BF00889179.
. 1990. “Land-Use By Immigrant Baoulé Farmers In The Taï Region, South-West Côte D'ivoire (Ivory Coast)”. Agroforestry Systems 11 (2): 101-123. doi:10.1007/BF00838724. http://link.springer.com/article/10.1007/BF00838724.
. 1990. “Living Fences: A Close-Up Look At An Agroforestry Technology”. Agroforestry Today (Kenya) 2 (1): 11-13.
. 1990. “Living Stakes: Kenyan Farmers Introduce An Agroforestry Technology”. Agroforestry Today 2 (2): 8.
. 1990. “Medicine From Plants”. Science 247 (4942): 513. doi:10.1126/science.2300807. http://www.jstor.org/stable/2873781.
. 1990. “Microenvironments Unobserved”. In Proceedings Of The International Symposium On Natural Resources Management For A Sustainable Agriculture, February 6-10, 1990, 179-205. New Delhi: Indian Society of Agronomy.
. 1990. “People In Between: A Case Study On The Kumil Timber Project, Madang Province, Papua New Guinea”. Copenhagen: International Work Group for Ingineous Affairs. http://www.worldcat.org/oclc/22234105.
. 1990. “Plant-Based Livestock Medication”. In Agroforestry Technology Information Kit (Denr/Iirr/Ff).
. 1990. “Program Of Events”. In International Association For The Study Of Common Property: "Designing Sustainability On The Commons," 27-30 September 1990, Held At Duke University, Durham, North Carolina. Durham, NC: Duke University. https://dlc.dlib.indiana.edu/dlc/browse?value=Designing+Sustainability+on+the+Commons%2C+the+First+Biennial+Conference+of+the+International+Association+for+the+Study+of+Common+Property&type=conference.
. 1990. “Promoting The Fertilizer Bush In Agroforestry On-Farm Research: A Participatory Approach”. In Paper Presented At American Society Of Agronomy Conference, October 21-26, 1990, San Antonio, Texas. San Antonio, TX.
. 1990. “Proposal For Research Funding: Formal Representation And Use Of Indigenous Knowledge Of Agroforestry”. University of Wales; University of Edinburgh.
. 1990. “Refugees And Forestry”. USAID.
. 1990. “Research-Client Linkages: The Role Of Ngos In Agroforestry/Natural Resource Management Technology & Transfer”. Little Rock, AR: Winrock International Institute for Agricultural Development.
. 1990. “The Role Of Soil Biodiversity In Sustainable Dryland Farming Systems”. In Dryland Agriculture: Strategies For Sustainability, 241-251. New York: Springer. doi:https://doi.org/10.1007/978-1-4613-8982-8_12.
. 1990. “Sustainable Yield In Coastal Zone And Aquatic Ecosystems”. In Prepared For The National Research Council Panel On Collaborative Research Support For Aid's Sustainable Yield And Natural Resource Management (Sanrem) Project, November 1990.
