“Heavy Metal Contamination of African Cat Fish (Clarias Gariepinus) from Industrial Effluent and Domestic Waste-Contaminated Rivers and Home Bred Sources in Zaria, Nigeria”. African Journal of Biomedical Research, bd. 23, nr. 1, januar 2020, s. 101-5, https://ojshostng.com/index.php/ajbr/article/view/874.