Ikpegbu , E., et al. “MORPHOLOGY OF THE DIGESTIVE TRACT OF THE FARMED NILE TILAPIA FISH Orechromis Niloticus (Linnaeus, 1758) FROM EASTERN NIGERIA”. Nigerian Journal of Fisheries, vol. 17, no. 2, Dec. 2018, pp. 2082-91, https://fisonjournal.org.ng/index.php/njf/article/view/345.