“Effects of Source-Sink Manipulations Onseed Yield of Cowpea (Vigna Unguiculata (L.) Walp.). I-Defoliation”. Tropical Agriculture 55, no. 2 (April 30, 1978). Accessed April 28, 2025. https://journals.sta.uwi.edu/ojs/index.php/ta/article/view/3002.