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References
- ↑ Pennsylvania State Geologist 1884, p. 178.
- ↑ Furman & Swain 1881, p. 400.
- ↑ RLE 1901, p. 13.
- ↑ Sinclair 1907, p. 505.
- ↑ Bianculli 2001, p. 184.
Bibliography
- Bianculli, Anthony J. (2001). Trains and Technology: Bridges and Tunnels ; Signals . University of Delaware Press. p. 184. ISBN 978-0-87413-729-3.
- Furman, H. V.; Swain, A. E. (11 June 1881). "Underground Haulage in the Coal Mines of Pennsylvania". The Mining and Engineering Journal. 31. Western: 400.
- Pennsylvania State Geologist (1884). Report of Progress, Pennsylvania. State Geologist (1874-1890). Board of Commissioners for the Second Geological Survey. p. 178.
- Sinclair, Angus (1907). Development of the Locomotive Engine: A History of the Growth of the Locomotive from Its Most Elementary Form, Showing the Gradual Steps Made Toward the Developed Engine, with Biographical Sketches of the Eminent Engineers and Inventors who Nursed it on Its Way to the Perfected Form of To-day. Many Particulars are Also Given Concerning Railroad Development. A. Sinclair publishing Company. p. 505.
- RLE (1901). Railway and Locomotive Engineering: A Practical Journal of Motive Power, Rolling Stock and Appliances. Angus Sinclair Company.