Railroad Archives Online
- CollectionE0437 - Jim Parker Collection
- Series004 - Northern Pacific Railroad Company
- Subseries Level 1014 - Photographs
- Subseries Level 2001 - Railroads--Equipment and Supplies
- Subseries Level 3003 - Freight Cars
- Item47378 - Northern Pacific Freight Car Number 1379, Ritzville, Washington, 1968
- Item47379 - Northern Pacific Freight Car Number 1213, Spokane, Washington, 1967
- Item47380 - Northern Pacific Freight Car Number 1755, Sprague, Washington, 1967
- Item47381 - Northern Pacific Freight Car Number 3155, Kewanee, Illinois, 1973
- Item47433 - Northern Pacific Freight Car Number 7788, Girard, Pennsylvania, 1960
- Item47434 - Northern Pacific Freight Car Number 8211, Sprague, Washington, 1967
- Item47436 - Northern Pacific Freight Car Number 8323, Concord, Ontario, 1973
- Item47437 - Northern Pacific Freight Car Number 8591, Folsum, New Mexico, 1975
- 30 more...