Railroad Archives Online
- CollectionD0036 - George Werkema Collection
- Series003 - Great Northern Railway Company (U.S.)
- Subseries Level 1014 - Photographs
- Subseries Level 2001 - Railroads--Equipment and Supplies
- Subseries Level 3003 - Freight Cars
- 91 more...
- Itemimg506 - Great Northern Boxcar 13112 at Denver, Colorado, 1982
- Itemimg507 - Great Northern Boxcar 13132 at Albuquerque, New Mexico, 1978
- Itemimg508 - Great Northern Boxcar 13171 at Albuquerque, New Mexico, 1978
- Itemimg509 - Great Northern Boxcar 13200 at Albuquerque, New Mexico, 1978
- Itemimg510 - Great Northern Boxcar 13201 at Albuquerque, New Mexico, 1978
- Itemimg511 - Great Northern Boxcar 13325 at Denver, Colorado, 1978
- Itemimg512 - Great Northern Boxcar 13332 at Denver, Colorado, 1965
- Itemimg513 - Great Northern Boxcar 13356 at Albuquerque, New Mexico, 1981
- Itemimg514 - Great Northern Boxcar 13404 at Albuquerque, New Mexico, 1977
- 419 more...