1. A review of insect prevalence in maize (Zea mays) and bean (Phaseolus vulgaris L.) polycultural systems;Altieri;Field Crops Res.,1978
2. Adopters and adapters: the participation of farmers in on-farm research;Ashby,1991
3. Selection and testing environments for improved performance under reduced-input conditions;Bramel-Cox,1991
4. Economic criteria for establishing plant breeding programs;Brennan,1991
5. Appropriate biotechnology in small-scale agriculture: how to reorient research and development;Bunders,1991