Railroad Archives Online
- CollectionD0011 - James M. Fredrickson Collection
- Series004 - Northern Pacific Railroad Company
- Subseries Level 1014 - Photographs
- Subseries Level 2001 - Railroads--Equipment and Supplies
- Subseries Level 3010 - Miscellaneous
- ItemJMF01-03411.1 - Northern Pacific billboard at Tacoma, Washington, in 1952.
- ItemJMF01-03411.2 - Northern Pacific television advertisement, Seattle, Washington, circa 1960
- ItemJMF01-03411.3 - Northern Pacific television advertisement, Seattle, Washington, circa 1960
- ItemJMF01-03411.4 - Northern Pacific television advertisement, Seattle, Washington, circa 1960
- ItemJMF01-03411.5 - Northern Pacific sign at Tacoma, Washington, circa 1960
- 22 more...