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>Sorbo, Gunnar M. Tenants and Nomads in Eastern Sudan : A Study of Economic Adaptations in the New Halfa Scheme, Uppsala, Scandinavian Institute of African Studies, 1985, 160 p.
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Sorbo, Gunnar M. Tenants and Nomads in Eastern Sudan : A Study of Economic Adaptations in the New Halfa Scheme, Uppsala, Scandinavian Institute of African Studies, 1985, 160 p.