1. Methodology for the participation of small farmers in the design of on-farm trials;Ashby;Agricultural Administration,1986
2. Planning technologies appropriate to farmers. Concepts and procedures;Byerlee,1980
3. Flinn, J.C., Agroeconomic considerations in cassava intercropping research. In: Intercropping with cassava (Weber, E., Nestel, B. and Campbell, M. (Eds)), Proceedings of an International Workshop, IDRC, Ottawa.
4. Small farm development;Harwood,1979
5. On-farm agronomic trials in farming systems research and extension;Hildebrand,1985