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2. Crampton, E.P.T. 1979. Christianity in Northern Nigeria. London: Geoffrey Chapman.
3. Furse, Sir Ralph. 1962. Aucaparius: Recollections of a Recruiting Officer. London: Oxford University Press.
4. Graham, Sonia. 1966. Government and Mission Education in Northern Nigeria, 1900-1919 (with special reference to the work of Hanns Vischer). Ibadan: Ibadan University Press.
5. Hubbard, James Patrick 1973. “Education under Colonial Rule: A History of Katsina College 1921-1942.” PhD thesis, University of Wisconsin.