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
- 54 more...
- Itemimg469 - Great Northern Boxcar 50561 at Denver, Colorado, 1964
- Itemimg470 - Great Northern Boxcar 50561 at Denver, Colorado, 1964
- Itemimg471 - Great Northern Boxcar 51838 at Denver, Colorado, 1966
- Itemimg472 - Great Northern Boxcar 52960 at Benchland, Montana, 1965
- Itemimg473 - Great Northern Boxcar 2527 at Wenatchee, Washington, 1968
- Itemimg474 - Great Northern Boxcar 3006 at Albuquerque, New Mexico, 1979
- Itemimg475 - Great Northern Boxcar 3078 at Denver, Colorado, 1967
- Itemimg476 - Great Northern Boxcar 3105 at Denver, Colorado, 1978
- Itemimg477 - Great Northern Boxcar 3117 at Albuquerque, New Mexico, 1979
- 456 more...