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 3006 - Cabooses (Railroads)
- 16 more...
- ItemJMF08-05458.0 - Northern Pacific Railroad Caboose Number 1916, circa 1925.
- ItemJMF08-05459.0 - Northern Pacific Railroad Caboose, Number 1568 at Easton, Washington, circa 1925.
- ItemJMF08-05460.0 - Northern Pacific Railroad Caboose at Easton, Washington, circa 1925.
- ItemJMF08-05461.0 - Northern Pacific Railroad Caboose, Number 1013 at Cathcart, Washington in July, 1986.
- ItemJMF08-05483.0 - Northern Pacific Railroad Caboose at Martin, Washington in 1949-50.
- ItemJMF17-12709.0 - Northern Pacific caboose 10036 on a freight train at Burr Canyon, Washington in 1981.