1. Aitken, Henry D. (1956) The age of ideology, New York, American Machinist, Chicago.
2. Baker, T. (1878) The elements of practical mechanism and machine tools with remarks on tools and machines by James Nasmyth, London.
3. Buchanan, Robertson (1841). Practical essays on mill work and other machinery, London.
4. Calvert, Monte A. (1967). The mechanical engineer in America, 1830–1910, The Johns Hopkins Press, Baltimore.
5. Cassier’s Magazine, New York.