Observations on the comparative merits of locomotive & fixed engines as applied to railways - Stephenson, Robert 1803-1859 (Printed by Wales and Baines, and sold by them and the booksellers in Liverpool, 1830)
Goldsmiths'-Kress no. 26334. - OCLC, 17424258. - Reproduction of original from Goldsmiths' Library, University of London