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 3005 - Maintenance of Way cars
- 32 more...
- ItemJMF08-05477.0 - Northern Pacific Railroad Rotary Snow Plow Number 42 at Martin, Washington in 1949-50.
- ItemJMF08-05478.0 - Northern Pacific Railroad Rotary Snow Plow Number 9 at Martin, Washington in 1949-50.
- ItemJMF08-05479.0 - Northern Pacific Railroad Rotary Snow Plow Number 9 at Martin, Washington in 1949-50.
- ItemJMF08-05480.0 - Northern Pacific Railroad Rotary Snow Plow Number 9 at Martin, Washington in 1949-50.
- ItemJMF08-05481.0 - Northern Pacific Railroad Rotary Snowplow Number 9 at Martin, Washington in 1949-50.
- ItemJMF08-05482.0 - Northern Pacific Railroad Rotary Snow Plow Number 9 at Martin, Washington in 1949-50.
- ItemJMF08-05485.0 - Northern Pacific Railroad Inspection Car at Tacoma, Washington in 1915.
- ItemJMF08-05486.0 - Northern Pacific Railroad Work Train at Tacoma, Washington in March, 1971.
- ItemJMF08-05487.0 - Northern Pacific Railroad Inspection Car at Tacoma, Washington in 1915.
- 31 more...