Southern Pacific Transportation Company - Wikipedia
Southern Pacific Railroad
Union Pacific Railroad map: 2013 routes and major cities - Trains
Map of the Southern Pacific Rail Road and Connections. June 1875 - Barry Lawrence Ruderman Antique Maps Inc.
California Southern Railroad - Wikipedia
Southern Pacific Railroad of Mexico, Ferrocarril Sud-Pacifico de Mexico, the west coast route, ruta de la costa occidental by Terry, T. Philip: (1938) Map | Antiqua Print Gallery
Union Pacific Railroad map: 2013 routes and major cities - Trains