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The peoples of greater Unyamwezi, Tanzania : (Nyamwezi, Sukuma, Sumbwa, Kimbu, Konongo)
Abrahams, Raphael G., (1967)
Political roles in a new state : Tanzania's first decade
Hopkins, Raymond F., (1971)
Northwest Tanzania under German and British rule : colonial policy and tribal politics, 1889 - 1939
Austen, Ralph A., (1968)
East African societies
Shorter, Aylward, (1974)