1. Amajor, L.C. (1987) The Eze-Aku sandstone ridges (Turonian) of southeastern Nigeria. A re- interpretation of their Depositional origin. Nigerian Journal of mining and Geology, v.23, p.19-26.
2. Ajayi, T.R., Isklander, F.Y., Asubiojo, O.I. and Klein, D. (1989) Geochemistry of upper creataceous clastic sediments of ifon area Southwestern Nigeria. Journal of Mining and Geology, v.25, p.11-24.
3. Akpokodje, E.G., Etu-Eteotor, J.O. and Olorunfemi, B.N. (1991) The composition and physical properties of some ceramics and pottery clays of south Eastern Nigeria. Journal of Mining and Geology, v.27, p.9-15.
4. Akaegbobi, M.I. and Schmitt, M. (1998) Organic Facies, Hydrocarbon Source Potentials and Reconstruction of the Depositional Paleoenvironment of the Campano-Maastrichtian Nkporo Shale in the Cretaceous Anambra Basin, Nigeria. Nigerian Association of Petroleum Explorationists Bulletin, v.13, p.1-19.
5. Triassic–Jurassic weathering and clay mineral dispersal in basement areas and sedimentary basins of southern Sweden