00762cam a22002411 4500 gs 56000024 DLC 20260227111403.0 830210s1954 xx ab 000 0 eng gs 56000024 (OCoLC)16765048 DLC OrPS DLC premarc f-nr--- TN810.N5 S5 Simpson, A. The Nigerian coalfield: the geology of parts of Onitsha, Owerri and Benue Provinces. [Zaria] Nigerian Govt., 1954. viii, 85 p. illus., maps (part fold., part col., 4 in pocket) diagrs., tables. 25 cm. Coal Nigeria. Geology Nigeria. Geological Survey of Nigeria. Bulletin ; no. 24. 29016 29016