Ogbeibu’i, A. E., and M. . O. Omoigberalc. “Envi Ronmental Impact of Oil Exploration on the Crustacean Zooplankton of Osse River, Southern Nigeria”. Biological Sciences - PJSIR, vol. 50, no. 4, Aug. 2007, pp. 266-72, http://v2.pjsir.org/index.php/biological-sciences/article/view/994.