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 3004 - Railroad passenger cars
- 192 more...
- ItemJMF05-04055.0 - Diagram of Northern Pacific Railroad Observation Car Number 1710-19 at St. Paul, Minnesota in 1938.
- ItemJMF05-04056.0 - Northern Pacific Railroad Parlor Car Number 1733 at St. Paul, Minnesota, circa 1962.
- ItemJMF05-04057.0 - Northern Pacific Railroad Parlor Cars, Number 1730 And 1734 at St. Paul, Minnesota, circa 1962.
- ItemJMF05-04058.0 - Northern Pacific Railroad Parlor Car Number 1793 at Tacoma, Washington, circa 1935.
- ItemJMF05-04058.1 - Northern Pacific Railroad Parlor Car Number 1799 at Tacoma, Washington, circa 1935.
- ItemJMF05-04059.0 - Northern Pacific Railroad Parlor Car Number 1793 at Tacoma, Washington, circa 1935.
- ItemJMF05-04060.0 - Northern Pacific Railroad Parlor Car Number 1799 at Tacoma, Washington, circa 1935.