Erickson, Clark L. (1986) 1986. “Agricultura En Camellones En La Cuena Del Lago Titicaca: Aspectos Tecnicos Y Su Futuro”. In Andenes Y Camellones En El Peru Andino: Historia Presente Y Futuro, 331-50. Lima, Peru: Consejo Nacional de Ciencia y Techologia, Oficina de Politica Cientifica y Technologica.
Bolivia
Poole, Peter. (1989) 1989. Developing a Partnership of Indigenous Peoples, Conservationists, and Land Use Planners in Latin America. Policy, Planning, and Research Working Papers -- Environment (WPS 245). Washington, DC: Latin America and the Caribbean Technical Dept., World Bank. http://www.worldcat.org/oclc/29810664.
Lawrence, Anna. (1993) 1993. “Inga Edulis: A Tree for Acid Soils in the Humid Tropics”. NFT Highlights 93-04. https://www.winrock.org/factnet-a-lasting-impact/fact-sheets/inga-edulis-a-tree-for-acid-soils-in-the-humid-tropics/.
Clay, Jason W. (1992) 1992. “Report on Funding and Investment Opportunities for Income Generating Activities That Could Complement Strategies to Halt Environmental Degradation in the Greater Amazon Basin”. Cambridge, MA: Cultural Survival, Inc.