1. Agarwal, Bina (1980) The woodfuel problem and the diffusion of rural innovations. Report submitted to the U.K. Tropical Products Institute.
2. Alvim P de T (1977) Cacao. In: P de T Alvim and TT Kozlowsky (eds). Ecophysiology of tropical crops: 279?310. Academic Press, New York.
3. Ball JB (1977) Taungya in southern Nigeria. Project working document, FAO/ UNDP Forest Development Project NIR/71/546-?14, Ibadan, Nigeria.
4. Brokensha D and Riley B (1978) Forest, foraging, fences and fuel in a marginal area of Kenya, Social Process Research Institute, University of California, Santa Barbara. Paper for USAID Africa Bureau Firewood Workshop, Washington, D.C.
5. Budowski Gerardo (1982). The socio-economic effects of forest management on lives of people living in the area: the case of Central America and some Caribbean countries. In: EG Hallsworth, (ed). Soio-economic effects and constraints in tropical forest management. John Wiley & Sons Ltd, London.