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Importation of African-Brazilian honeybees : hearing before the Subcommittee on Agricultural Research and General Legislation of the Committee on Agriculture and Forestry, United States Senate, Ninety-fourth Congress, first session, on S. 18 ... June 3, 1975
(1975)
Distribution of gains from research and promotion in multi-stage production systems : further results
Chung, Chanjin, (1998)
Challenging the populist perspective : rural people's knowledge, agricultural research and extension practice
Scoones, Ian, (1993)