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Africa : including South Africa, Rhodesia, Nyasaland, British East Africa, Uganda, Somaliland, Anglo-Egyptian Sudan & Egypt, Gambia, Sierra Leone, Gold Coast, Nigeria, Walfish Bay, with Mauritius and other islands in the Indian and Atlantic Oceans
Herbertson, A. J., (1914)
Nigeria and West Africa
Reed, Andrew, (1990)
Peoples of the middle Niger region, Northern Nigeria
Gunn, Harold D., (1960)
Economic recovery : the CBN hones its tools
Sanusi, J. O., (2001)