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The effects of administrative policy on tribalism and inter-tribal conflict : the history and present condition of the Zeyadiya of Darfur
El-Hakim, Sherif Mahmoud, (1975)
The Murle : red chiefs and black commoners
Lewis, Bazett A., (1972)
Social theory and African tribal organization : the development of socio-legal theory
Carlston, Kenneth Smith, (1968)