Usman, . B.; Falusi, O.; Daudu, O. A. Y.; Abubakar, A.; Nwosu, D. J.; Titus, S. D.; Muhammad, L. M. Phenotypic Variability Studies in Selected Accessions of Nigerian Wild Cowpea (Vigna Unguiculata L. Walp). GSC Biol. Pharm. Sci. 2018, 3, 19-27.