M'Queen, J. (1840). A Geographical Survey of Africa: Its Rivers, Lakes, Mountains, Productions, States, Population, Etc: With a Map on an Entirely New Construction to which is Prefixed a Letter to Lord John Russell Regarding the Slave Trade and the Improvement of Africa:(New Impr.).
Orr, C. W. J. (1911). The making of northern Nigeria. Macmillan and Company, Limited.
N.A(1968) Nigerian-Biafran Relief Situation, Hearing before the United States Senate, Ninetieth Session, October 4, 1968
Equiano, O. (1794). Interesting Narrative of the Life of Olaudah Equiano, or Gustavus Vassa, the African, Written by Himself.
N.A(1851) Extracts from the Evidence taken Before Committees of the two Houses of Parliament relative to the slave trade, with illustrations from the collateral Sources of Information
Kilby, P. (1967). Industrialization in an open economy: Nigeria, 1945-1966.
Allen, W., & Thomson, T. R. H. (1848). A Narrative of the Expedition Sent by Her Majesty's Government to the River Niger, in 1841, Under the Command of Captain HD Trotter, RN (Vol. 1). R. Bentley.
Brougham, H. B. B. (1838). Immediate Emancipation: The Speech of Lord Brougham in the House of Lords on Tuesday, February 20, 1838, on Slavery and the Slave-trade (Vol. 21, No. 6). Central Emancipation Committee.
Thrasher, J. B. (1861). Slavery, a Divine Institution: A Speech Made Before the Breckinridge and Lane Club, November 5th, 1860. Southern reveille Book and job Office.
Haydn, J. (1866). Haydn's Dictionary of Dates and Universal Information Relating to All Ages and Nations. Harper & Brothers.