- Author: Olufẹmi Odutayo Akinkugbe
- Language: English
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- Year: 1980
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- Language: German
- Year: 1983
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- Language: English
- Year: 1989
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- Year: 2009
- Author: Debra L. Klein
- Language: English
- Year: 2007
- Author: C.S. Nwajide A.I. Afuekwe A.A. Okafor A.E. Edozie A.C. Nwune E.I. Mbaekwe C.F. Ojukwu
- Language: English
- Year: 2011
- Author: Dare Babarinsa
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- Year: 2003
- Author: Thurston Alexander
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- Year: 2017
- Author: Siollun Max
- Language: English
- Year: 2013