Northern Provinces of Nigeria (Nigeria). Police Dept. (1917). Annual report on the Police Department, Northern Provinces, for the year .. Govt. Printer.
Citace podle Chicago (17th ed.)Northern Provinces of Nigeria (Nigeria). Police Dept. Annual Report on the Police Department, Northern Provinces, for the Year .. Lagos: Govt. Printer, 1917.
Citace podle MLA (8th ed.)Northern Provinces of Nigeria (Nigeria). Police Dept. Annual Report on the Police Department, Northern Provinces, for the Year .. Govt. Printer, 1917.
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