OgbesejanaA. B., SaboS. A., AlisiI. O., EgwuA. C., and OdusinaB. O. “GEOCHEMISTRY OF THE UPPER CRETACEOUS SHALES FROM GOMBE FORMATION, GONGOLA BASIN, UPPER BENUE TROUGH, NIGERIA: IMPLICATIONS FOR PROVENANCE AND TECTONIC EVOLUTION”. FUDMA JOURNAL OF SCIENCES, Vol. 8, no. 6, Dec. 2024, pp. 528 -38, doi:10.33003/fjs-2024-0806-3013.