N., N. I., N. Arvin, and O. J. Anayochukwu. “Evaluation of the Effect of Petrol Fumes on Calcium and Uric Acid Level of Petrol Attendants in Enugu State, Nigeria”. The International Journal of Science & Technoledge, vol. 5, no. 10, Oct. 2017, http://internationaljournalcorner.com/index.php/theijst/article/view/123666.