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2
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African bean production environments : their definition, characteristics and constraints / Charles S. Wortmann and David J. Allen.
- CIAT,
- 1994.
- Dar es Salaam :
-
An investigation of alternative bean seed marketing channels in Uganda / Soniia David, Sarah Kasozi and Charles Wortmann.
- CIAT,
- 1997.
- Kampala :