@article{ljs21033,
 author={Yisa, J. and Jimoh, T. O. and Oyibo, O. M.},
 year={2012},
 title={Underground Water Assessment using Water Quality Index},
 journal={Leonardo J. Sci.},
 volume={11},
 number={21},
 pages={33-42},
 url={http://ljs.academicdirect.org/A21/033_042.pdf}
}