Sperling, L., Scheidegger, U. C., & Buruchara, R. A. (1994). Designing seed systems for smallholder farmers: Principles derived from bean research in the Great Lakes region of Africa. International Center for Tropical Agriculture.
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Cita Chicago Style (17a ed.)
Sperling, L., Urs C. Scheidegger, y Robin Arani Buruchara. Designing Seed Systems for Smallholder Farmers: Principles Derived from Bean Research in the Great Lakes Region of Africa. International Center for Tropical Agriculture, 1994.
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Cita MLA (9a ed.)
Sperling, L., et al. Designing Seed Systems for Smallholder Farmers: Principles Derived from Bean Research in the Great Lakes Region of Africa. International Center for Tropical Agriculture, 1994.
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