“Evaluation of Rhizobial (Rhizobium sp.) Isolates for Their Effects on Cowpea [Vigna Unguiculata (L.) Walp.] Growth and Yield. (36)”. Tropical Agriculture 80, no. 1 (January 30, 2003). Accessed April 24, 2025. https://journals.sta.uwi.edu/ojs/index.php/ta/article/view/1263.