“Combining Ability Studies for Seed Yield and Contributing Characters of F1 and F2 Generations in Cowpea [Vigna Unguiculata L. Walp.].”. Electronic Journal of Plant Breeding 7, no. 3 November 9, 2016: 649-656. Accessed April 24, 2024. https://ejplantbreeding.org/index.php/EJPB/article/view/792.