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ALHASSAN, A. .; YUSUF IDI, B. .; NASIR, M. M. .; USMAN, N. .; HUSSAINI, A. .; BALA, N. .; IBRAHIM, A. .; YAKUBU, N.; AYUBA, I. DETECTION OF LITHOLOGICAL BOUNDARIES USING SECOND ORDER VERTICAL DERIVATIVES OF AEROGRAVITY DATA; A CASE OF HADEJIA SEGMENT OF THE CHAD BASIN, JIGAWA STATE NIGERIA. BIMA 2021, 5, 111-118.