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Conflict resolution : the case of Nigeria and Sudan
Salih, Kamal, (1984)
Einige grundlegende Tatsachen die Lage des serbischen Volkes in Kroatien betreffend
(1991)
The creation and termination of the Ethio-Eritrean federation and the rise of Eritrea to national revolution
Yohannes, Okbazghi, (1986)