1. Stratigraphy and sedimentation in the Senonian Anambra Basin of Southeastern Nigeria;Agagu;Niger. J. Min. Geol.,1985
2. Geotechnical assessment of road failures in the Abakaliki area, southeastern Nigeria;Aghamelu;Int. J. Civ. Environ. Eng.,2011
3. Laboratory testing in soil engineering;Akroyd,1957
4. Annual Book. ASTM Standard, Part 19, Philadelphia;American Society for Testing and Material (ASTM C97, 2354),1989
5. Cretaceous bentonite deposits of Manitoba. Publication 62–5;Bannatyne,1963