OLANIYI, W.A. “EVALUATION OF MINERAL CONTENTS IN AFRICAN CATFISH SPECIES - Clarias Gariepinus, Heterobranchus Bidorsalis AND HYBRIDS OF BOTH SPECIES”. Nigerian Journal of Fisheries, vol. 12, no. 1, June 2015, pp. 776-80, https://fisonjournal.org.ng/index.php/njf/article/view/209.