Fadina, O. O., et al. “Determination of Organochlorine Residues in Cowpea (Vigna Unguiculata L. WALP) From Selected Markets in Ibadan, Oyo State, Nigeria”. Journal of Agricultural Studies, vol. 9, no. 4, Nov. 2021, pp. 72-86, doi:10.5296/jas.v9i4.19228.