1. The Need to Conserve Farm Animal Genetic Resources Through Community-Based Management in Africa: Should Policy Makers be Concerned? SUST 106;Buchner Barbara;Causes of Loss of Animal Genetic Diversity: Analysis and Assessment SUST 110.2001 M.A. JABBAR and M.L. DIEDHOU: Does Breed Matter to Cattle Farmers and Buyers? Evidence from West Africa SUST,2001
2. Technological Change in Economic Models of Environmental Policy: A Survey