Haig, Maham H (Ed, 1907). Railway Shop Up to Date: A Reference Book of Up to Date American Railway Shop Practice, Chicago: Railway Master Mechanic (Crandall Publishing Company). Gutenberg Free Download 12148, or here (55.7Mb pdf), prepared from the original in 2003.
Knotts, Stan (1991). 'Hoisting Machinery' (Cranes, Hoists, Derricks, Telphers, Cableways, Tramways, Excavating Machines, Loading and Unloading Machines, Winches, Trackage, Accessories), an
NMRA clinic, 10pp illustrated.
