Railroad Archives Online
- CollectionD0011 - James M. Fredrickson Collection
- Series008 - Union Pacific Railroad Company
- Subseries Level 1014 - Photographs
- Subseries Level 2001 - Railroads--Equipment and Supplies
- Subseries Level 3013 - Railroad Accidents
- 6 more...
- ItemJMF17-12748.4 - Union Pacific accident at Pioneer Pit, Washington in 1972.
- ItemJMF17-12748.5 - Union Pacific accident at Pioneer Pit, Washington in 1972.
- ItemJMF17-12748.6 - Union Pacific accident at Pioneer Pit, Washington in 1972.
- ItemJMF17-12748.7 - Union Pacific accident at Pioneer Pit, Washington in 1972.
- ItemJMF13-05838.0 - A Union Pacific Railroad accident at South Tacoma, Washington,in 1913.
- ItemJMF13-05839.0 - A Union Pacific Railroad accident at South Tacoma, Washington in 1913.