1. 2001. Status and dynamics of natural resources in Ethiopia. In Food Security through Sustainable Land Use: Population, Environment and Rural Development Issues for Sustainable Livelihoods in Ethiopia, (ed.). NOVIB partners Forum on Sustainable Land Use: Addis Ababa; 165-184.
2. 1997. A Participatory Agroforestry Approach for Soil and Water Conservation in Ethiopia. Tropical Resource Management Papers, No. 17, Wageningen Agricultural University: Wageningen.
3. (eds). 1993. Farmer First: Farmer Innovation and Agricultural Research, IT Publications: London.
4. 1988. Environment and development in Ethiopia. In Beyond the Famine: An Examination of the Issues Behind Famine in Ethiopia, (ed.). International Institute for Relief and Development and Food for the Hungry International: Geneva.