ABIODUN , J. A., et al. “ASSESSMENT OF FISH STOCK AND PLANKTON OF OLI RIVER, KAINJI LAKE NATIONAL PARK, NIGERIA”. Nigerian Journal of Fisheries, vol. 14, no. 1_2, June 2017, pp. 1201-6, https://fisonjournal.org.ng/index.php/njf/article/view/193.