AMANAMBU, Amobichukwu Chukwudi. Geogenic Contamination: Hydrogeochemical processes and relationships in Shallow Aquifers of Ibadan, South-West Nigeria. Bulletin of Geography. Physical Geography Series. Online. 28 December 2015. No. 9, pp. 5-20. [Accessed 6 July 2025]. DOI 10.2478/8248.