Adrama, Joel F. The political economy of the plantation system in colonial Tanganyika : 1891-1961 Joel F. Adrama - Dar es Salaam University of Dar es Salaam 1977 - 56p. ill. 34cm. - Paper; 55 . Subjects--Topical Terms: Plantation systemGovernment policy, History, Economic conditions LC Class. No.: EAF QTO HC557.T3D3 No.55