California and the expositions cover
Union Pacific
Derivative of <a href="//commons.wikimedia.org/wiki/File:California_and_the_expositions,_Yellowstone_National_Park_-_how_to_go_and_what_to_see_en_route_Union_Pacific_System_(IA_californiaexposi422unio).pdf" title="File:California and the expositions, Yellowstone National Park - how to go and what to see en route Union Pacific System (IA californiaexposi422unio).pdf">File:California and the expositions, Yellowstone National Park - how to go and what to see en route Union Pacific System (IA californiaexposi422unio).pdf</a>