Osunbitan, J.A., B.A. Babalola, and D.A. Okunade. 2008. “Investigation of Quality and Usage of Groundwater Near Slaughter Houses in Basement Complex of Osun State, Nigeria”. Ife Journal of Technology 17 (1):47-51. http://ijt.oauife.edu.ng/index.php/ijt/article/view/12.