Railroad Archives Online
- FondsD0036 - George Werkema Collection
- Série003 - Great Northern Railway Company (U.S.)
- Sous-série014 - Photographs
- 001 - Railroads--Equipment and Supplies
- 003 - Freight Cars
- 441 en plus...
- Pièceimg870 - Great Northern Gondola 73816 at Albuquerque, New Mexico, 1978
- Pièceimg871 - Great Northern Gondola 73865 at Albuquerque, New Mexico, 1978
- Pièceimg872 - Great Northern Gondola 74697 at Pasco, Washington, 1981
- Pièceimg873 - Great Northern Gondola 74815, undated
- Pièceimg874 - Great Northern Gondola 75698 at Hillyard, Washington, 1965
- Pièceimg875 - Great Northern Gondola 77373 at Lewistown, Montana, 1965
- Pièceimg876 - Great Northern Gondola 78404 at Albuquerque, New Mexico, 1978
- Pièceimg877 - Great Northern Gondola 78437 at Belen, New Mexico, 1985
- Pièceimg878 - Great Northern Gondola 78454 at Denver, Colorado, 1982
- 69 en plus...