Trade and politics in the Niger Delta, 1830-1885 : an introduction to the economic and political history of Nigeria / K. Onwuka Dike. Dike, K. Onwuka. (Kenneth Onwuka) HC517.N48 D5 330.9669 DIT Bibliographical references included in "Note on the sources" p. 224-230 Oxford : Clarendon Press, 1956. 1956. 1956 Text vi, 250 p. : eng Oxford studies in African affairs. Nigeria Economic conditions. Nigeria Politics and government.