J. A, Idoko, Kalu B. A, and Osang P. O. “Influence of Maize Varieties and Date of Planting Cowpea into Maize/Cowpea Intercropping System in Makurdi, Southern Guinea Savannah, Nigeria”. International Journal of Sciences: Basic and Applied Research (IJSBAR) 38, no. 1 (April 20, 2018): 98–113. Accessed May 5, 2024. https://www.gssrr.org/index.php/JournalOfBasicAndApplied/article/view/8861.