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
- 511 more...
- Itemimg940 - Great Northern Flatcar 160704 at Bellingham, Washington, 1966
- Itemimg941 - Great Northern Flatcar 161157 at Hillyard, Washington, 1965
- Itemimg942 - Great Northern Flatcar 161340 at Amarillo, Texas, 1976
- Itemimg943 - Great Northern Tank Car 100001 at Interbay, Washington, 1982
- Itemimg944 - Great Northern Tank Car 100025 at Interbay, Washington, 1982
- Itemimg945 - Great Northern Tank Car 100075 at Interbay, Washington, 1982
- Itemimg947 - Great Northern Aircraft Component Car 60739 at Belen, New Mexico, 1982
- Itemimg948 - Great Northern Stock Car 157006, undated