Union Pacific 'Big Boy' Project Reference |
Big Boy
William W. Kratville
©1972
(Several Editions)
Motive Power of the Union Pacific
William W. Kratville
©1980
Union Pacific Prototype Photos Volume #38 (4-8-8-4 Big Boy)
Union Pacific Historical Society
ISBN#: 978-1-932704-30-3
Big Boy Portraits
John E. Bush & James L. Ehernberger
Challenger Press ©1996
Union Pacific Big Boy 4014 Restoration Project Information (web link)