^Signor, John R. (1988). The Los Angeles and Salt Lake Railroad Company; Union Pacific's Historic Salt Lake Route. San Marino, California: Golden West Books. p. 18. ISBN978-0-87095-101-5.
^Balkwill, Richard; Marshall, John (1993). The Guinness Book of Railway Facts and Feats (6th ed.). Enfield: Guinness Publishing. ISBN978-0-85112-707-1.
^"You ought to know: Electro-Motive's Dilworth is dead; diesel pioneer". Railway Age. 165 (16): 40. 21 October 1968.