Aluyi, H. S. A., Ekhaise, F. O., Adelusi, D. M. y Oviasogie, F. E. (2006) «EFFECT OF HUMAN ACTIVITIES AND OIL POLLUTION ON THE MICROBIOLOGICAL AND PHYSICOCHEMICAL QUALITY OF UDU RIVER, WARRI, NIGERIA», Estudos de Biologia, 28(62). doi: 10.7213/reb.v28i62.22716.