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- Language: English
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- Year: 1970
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Sudanese Ethics
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- Author: Tore Nordenstam
- Language: English
- Year: 1968
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- Language: English
- Year: 1975
- Author: United Nations Centre Against Apartheid
- Language: English
- Year: 1977
- Author: Björn Beckman
- Language: English
- Year: 1976