B. Otene, B., and S. I. Iorchor. 2013. “Water Nutrients Dynamics and Use of Chlorophyll ‘a’ in the Determination of Primary Productivity of Amadi-Ama Creek, Upper Bonny Estuary, Port Harcourt, Nigeria”. Scientific Journal of Environmental Sciences 2 (2):38-45. http://sjournals.com/index.php/sjes/article/view/1266.