1. Airey , A. 1978 “Some observations on the performance of the Integrated Agricultural Development Project in the Eastern Province, Sierra Leone” Conference on Rural Development Evaluation
2. The utility of the Nigerian peasant farmer's knowledge in the monitoring of agricultural resources;Barker;London Marc Report,1977
3. Binns , J. A. 1975 “The marketing of food crops in the diamond areas of the Eastern Province of Sierra Leone” Conference on Themes in Agricultural Marketing
4. “Where diamonds are not forever”;Binns;Geographical Magazine,1977a