1. Pressure water in the Chad formation of Bornu and Dikwa Emirates, Northeastern Nigeria;Barber;Bull. Geol. Surv. Niger.,1965
2. The distribution and chemical quality of groundwater in northern Nigeria;Du Preez;Bull. Geol. Surv. Niger.,1965
3. Un example d'étude d'hydrogéologie isotopique en pays semi-aride, le bassin du Lac Tchad;Faure;J. Hydrol.,1970
4. Explanatory notes, Geological map of Africa;Furon,1964
5. Essai de description des formations géologiques de la République du Niger;Greigert;Mémoires du BRGM,1967