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Wortmann, Charles S. ,  Ransom, JK ,  [Soil fertility research for maize and bean production systems of the Eastern Africa highlands : Proceedings of a workshop group meeting, Thika, Kenya, 1-4 September, 1992] ,  Soil fertility research for maize and bean production systems of the Eastern Africa highlands : Proceedings of a workshop group meeting, Thika, Kenya, 1-4 September, 1992

Wortmann, Charles S. ,  Allen, David J. ,  [African bean production environments: their definition, characteristics and constraints] ,  African bean production environments: their definition, characteristics and constraints

Wortmann, Charles S. ,  Bosch, CH ,  Mukandala, L ,  [The banana-bean intercropping system in Kagera region of Tanzania : results of a diagnostic survey] ,  The banana-bean intercropping system in Kagera region of Tanzania : results of a diagnostic survey

David, S. ,  Kasozi, S ,  Wortmann, Charles S. ,  [An investigation of alternative bean seed marketing channels in Uganda] ,  An investigation of alternative bean seed marketing channels in Uganda

Wortmann, Charles S. ,  [Assessment of yield loss caused by biotic stress on beans in Africa] ,  Assessment of yield loss caused by biotic stress on beans in Africa

Wortmann, Charles S. ,  Kirkby, Roger A. ,  Eledu, Charles A. ,  Allen, David J. ,  [Atlas of common bean (Phaseolus vulgaris L.) production in Africa] ,  Atlas of common bean (Phaseolus vulgaris L.) production in Africa