Mohammed, A. S., Adamu, A. K., Mu’azu, S., Nafiu, M. I. and Nura, S. (2020) “Effect of Crossability in Improving Some Selected Cowpea (Vigna Unguiculata [L.,] Walp) Varieties ”, International Journal of Science for Global Sustainability, 6(2), p. 8. Available at: https://www.fugus-ijsgs.com.ng/index.php/ijsgs/article/view/108 (Accessed: 24 July 2026).