Udom, GN, AS Fagam, FE Babatunde, and IM Maina. “Path Coefficient Analysis of the Components of Grain Yield in Intercropped Cowpea, Growth in Borno, Nigeria”. International Journal of Natural and Applied Sciences 2, no. 4 (October 19, 2006): 310–316. Accessed October 14, 2026. https://www.ajol.info/index.php/ijonas/article/view/36111.