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 3002 - Diesel locomotives
- 456 more...
- ItemJMF01-03452.0 - Northern Pacific Mainstreeter at East Auburn, Washington, in 1968.
- ItemJMF01-03453.0 - Northern Pacific Mainstreeter at Spokane, Washington, in 1968.
- ItemJMF01-03454.0 - Northern Pacific Mainstreeter at Sandpoint, Idaho, in 1968.
- ItemJMF01-03455.0 - Northern Pacific Mainstreeter at Sandpoint, Idaho, in 1968.
- ItemJMF01-03457.0 - Northern Pacific Mainstreeter at Thompson Falls, Montana, in 1968.
- ItemJMF01-03458.0 - Northern Pacific Mainstreeter at Paradise, Montana, in 1968.
- ItemJMF01-03460.0 - Northern Pacific Mainstreeter Missoula, Montana, circa 1953.
- ItemJMF01-03462.0 - Northern Pacific Mainstreeter at Missoula, Montana, in 1968.
- ItemJMF01-03464.0 - Northern Pacific Mainstreeter near Livingston, Montana, circa 1954.
- 184 more...