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References
- ↑ Donald C. Jackson, Building the Ultimate Dam: John S. Eastwood and the Control of Water in the West (University of Oklahoma Press, 2005), pp. 22–23 online.
- ↑ Charles Couche, Permanent Way Rolling Stock and Technical Working of Railways (London, 1877, translation of French edition) vol. 1, p. 471 online.
- ↑ Annales des ponts et chaussées (Paris, 1852), pp. 93–93 online; Annales des mines 5 (1854), pp. 411–412 online; Auguste Perdonnet, Traité élémentaire des chemins de fer (Paris, 1865), vol. 1, p. 458 online.
- ↑ French Ministry of Agriculture, Commerce, and Public Works, Notices sur les modèles, cartes et dessins relatifs aux travaux publics (Paris, 1867), p. 27 online; Annales des ponts et chaussées 13 (1887), p. 675 online.