Olufade, YA, MB Sosan, and JAO Oyekunle. “Levels of Organochlorine Insecticide Residues in Cowpea Grains and Dried Yam Chips from Markets in Ile-Ife, Southwestern Nigeria: A Preliminary Survey”. Ife Journal of Science 16, no. 2 (March 9, 2016): 161–170. Accessed September 29, 2026. https://www.ajol.info/index.php/ijs/article/view/131728.