Tefera,Tolera Angessa Towards Improved Vegetable Use and Conservation of Cowpea and Lablab:Agronomic and Participatory Evaluation in Northeastern Tanzania and Genetic Diversity Study - 2006 ISBN: 10:3-86727-087-2 LC Class. No.: 641.33/TEF / 1 Dewey Class. No.: 641.33/TEF / 1