1. Proterozoic crustal development in the Pan-African regime of Nigeria;Ajibade,1987
2. The location of aquifers in crystalline rocks and alluvium in Northern Nigeria using combined electromagnetic and resistivity techniques;Hazell;Quater. J. Engin. Geol.,1988
3. Geology of southeastern (Sokoto) sector of Iullemenden Basin;Kogbe;Bull. Dept. of Geology, A. B. U., Zaria, Nigeria,1973
4. Electrical conductivity of soils and rocks;McNeill,1980
5. Electromagnetic terrain conductivity measurements at low induction numbers;McNeill,1980