1. Resource-poor Farmer Participation in Research: A Synthesis of Experiences from Nine National Agricultural Research Systems;Biggs,1989
2. THEPROM: an erosion-productivity model;Biot,1990
3. How long can high stocking densities be sustained?;Biot,1990
4. The Political Economy of Soil Erosion in Developing Countries;Blaikie,1985
5. Cost-benefit Analysis of the Farm Improvement with Soil Conservation Project;Bojö;Report of the SADCC Coordination Unit for Soil and Water Conservation and Land Utilisation,1987