Ayuba, R. A., and A. Nur. “Interpretation of Aeromagnetic Data Using Tilt and Total Horizontal Derivative Over Parts of Nasarawa and Environs, North-Central Nigeria”. The International Journal of Science & Technoledge, vol. 6, no. 7, July 2018, http://internationaljournalcorner.com/index.php/theijst/article/view/131409.