Western State (Nigeria). Ministry of Economic Planning and Social Development. Statistics Division. (1967). Western State of Nigeria statistical bulletin. The Division.
Chicago-viite (17. p.)Western State (Nigeria). Ministry of Economic Planning and Social Development. Statistics Division. Western State of Nigeria Statistical Bulletin. Ibadan: The Division, 1967.
MLA-viite (8. p.)Western State (Nigeria). Ministry of Economic Planning and Social Development. Statistics Division. Western State of Nigeria Statistical Bulletin. The Division, 1967.
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