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)
- ItemJMF01-03611.0 - Northern Pacific mixed train number 591 at Centralia, Washington, in 1954.
- ItemJMF01-03614.0 - Northern Pacific mixed train number 591 at Pe Ell, Washington, in 1954.
- ItemJMF01-03618.0 - Northern Pacific mixed train number 594 at Raymond, Washington, in 1954.
- ItemJMF01-03619.0 - Northern Pacific mixed train number 594 near Raymond, Washington, in 1954.
- ItemJMF02-03831.1 - Northern Pacific steam locomotive 1633 at Tacoma, Washington, in 1942.
- ItemJMF02-03797.0 - Northern Pacific diesel locomotive 335 at Tacoma-McCarver St, Washington, in 1962.
- ItemJMF02-03842.1 - Northern Pacific caboose at Tacoma, Washington, in 1969.
- ItemJMF08-05450.0 - Northern Pacific Railroad Caboose, Number 1000 at Forsyth, Montana in July, 1935.
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