S. W. Petters (May 1978). «Stratigraphic Evolution of the Benue Trough and Its Implications for the Upper Cretaceous Paleogeography of West Africa». The Journal of Geology86 (3): 311-322. Bibcode:1978JG.....86..311P. JSTOR30061985. doi:10.1086/649693.
S. W. Petters (May 1978). «Stratigraphic Evolution of the Benue Trough and Its Implications for the Upper Cretaceous Paleogeography of West Africa». The Journal of Geology86 (3): 311-322. Bibcode:1978JG.....86..311P. JSTOR30061985. doi:10.1086/649693.
jstor.org
S. W. Petters (May 1978). «Stratigraphic Evolution of the Benue Trough and Its Implications for the Upper Cretaceous Paleogeography of West Africa». The Journal of Geology86 (3): 311-322. Bibcode:1978JG.....86..311P. JSTOR30061985. doi:10.1086/649693.