The Linguistic Settlement of the Nuba Mountains by Robin Thelwall
The New University of Ulster and Thilo C. Schadeberg, Rijksuniversiteit te Leiden From: Sprache und Geschichte in Afrika 5 (1983) 219-231
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The New University of Ulster and Thilo C. Schadeberg, Rijksuniversiteit te Leiden From: Sprache und Geschichte in Afrika 5 (1983) 219-231