1. Michael Crowder, West Africa Under Colonial Rule. London :

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Library: Center and Library of Islamic Studies in European Languages (Qom)

2. 3. The Ordeal of Africa

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Library: Center and Library of Islamic Studies in European Languages (Qom)

3. William Gutteridge, The Military In African Politics. London and Toronto, Methuen Publications, 1969, pp. 166. 3.40

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Library: Center and Library of Islamic Studies in European Languages (Qom)