Não informado. (1954). Records of the Geological Survey of Nigeria. Ministry of Mines and Power.
Chicago-Zitierstil (17. Ausg.)Não informado. Records of the Geological Survey of Nigeria. Lagos: Ministry of Mines and Power, 1954.
MLA-Zitierstil (8. Ausg.)Não informado. Records of the Geological Survey of Nigeria. Ministry of Mines and Power, 1954.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.