McCracken, Jennifer A., and Jules N. Pretty. (1988) 1988. Glossary of Selected Terms in Sustainable Agriculture. Gatekeeper Series No. SA6. London; Washington, DC: International Institute for Environment and Development, Sustainable Agriculture Programme. http://www.worldcat.org/oclc/19531919.
subsistence agriculture
Nimuendajú, Curt. (1952) 1952. The Turkuna [sic Tukuna]. University of California Publications; American Archaeology and Ethnology 45. Berkeley, CA: University of California Press.
Östberg, Wilhelm, Sveriges Lantbruksuniversitet, Uppsala (Sweden), and International Rural Development Centre. (1988) 1988. We Eat Trees: Tree Planting and Land Rehabilitation in West Pokot District, Kenya: A Baseline Study (Working Paper). Forest, Trees and People Working Paper Np. 82. Uppsala [Sweden]: Swedish University of Agricultural Sciences, International Rural Development Centre. http://www.worldcat.org/oclc/610964356.
Clark, Kathleen, and Christopher Uhl. (1987) 1987. “Farming, Fishing, and Fire in the History of the Upper Río Negro Region of Venezuela”. Human Ecology 15 (1): 1-26. doi:10.1007/BF00891369.
Brush, Stephen B. (1977) 1977. “Agricultural Technology and Labor”. In Mountain, Field, and Family: The Economy and Human Ecology of an Andean Valley, 91-103. Philadelphia: University of Pennsylvania Press.