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 3002 - Diesel Locomotives
- Item47171 - Northern Pacific Diesel Locomotive Number 2529, Ellensburg, Washington, 1967
- Item47172 - Northern Pacific Diesel Locomotive Number 2809, Pasco, Washington, 1968
- Item47173 - Northern Pacific Diesel Locomotive Number 5620, Galesburg, Illinois, 1973
- Item47174 - Northern Pacific Diesel Locomotive Number 130, Saint Cloud, Minnesota, 1967
- Item47175 - Northern Pacific Diesel Locomotive Number 293, Livingston, Montana, 1969
- Item47208 - Northern Pacific Diesel Locomotive Number 345, 1967
- 34 more...