Shettima, B., F. D. Adams, A. I. Haruna, A. I. Goro, and M. Bukar. “GEOCHEMICAL FACIES OF THE TURONIAN GONGILA FORMATION, BORNU (CHAD) BASIN, NIGERIA: IMPLICATION FOR PROVENANCE, PALEOCLIMATE AND PALEOWEATHERING CONDITIONS”. International Journal of Research -GRANTHAALAYAH, vol. 6, no. 4, Apr. 2018, pp. 144-56, doi:10.29121/granthaalayah.v6.i4.2018.1637.