Andem, A. B; Udofia, U. U; Okorafor, K. A; George, U. U. "Bioaccumulation of some Heavy Metals and Total Hydrocarbon (THC) in the Tissues of Periwinkle (Tympanotonus Fuscatus Var Radula) in the Intertidal Regions of Qua Iboe River Basin, Ibeno, Akwa Ibom State, Nigeria". Greener Journal of Biological Sciences. 3 (7). 2013-08-11: 258–264. doi:10.15580/gjbs.2013.7.072913762. ISSN2276-7762.
worldcat.org
Andem, A. B; Udofia, U. U; Okorafor, K. A; George, U. U. "Bioaccumulation of some Heavy Metals and Total Hydrocarbon (THC) in the Tissues of Periwinkle (Tympanotonus Fuscatus Var Radula) in the Intertidal Regions of Qua Iboe River Basin, Ibeno, Akwa Ibom State, Nigeria". Greener Journal of Biological Sciences. 3 (7). 2013-08-11: 258–264. doi:10.15580/gjbs.2013.7.072913762. ISSN2276-7762.