Railroad Archives Online
- FondiE0437 - Jim Parker Collection
- Serija003 - Great Northern Railway Company (U.S.)
- Podserija014 - Photographs
- 001 - Railroads--Equipment and Supplies
- 003 - Freight Cars
- Dokument35342 - Great Northern Refrigerator Car Number 8609, Portland, Oregon, 1968
- Dokument35343 - Great Northern Refrigerator Car Number 8772, Wenatchee, Washington, 1969
- Dokument48387 - Great Northern Freight Car Number 973002, Galesburg, Illinois, 1983
- Dokument48388 - Great Northern Freight Car Number 973004, Saint Paul, Minnesota, 1981