Railroad Archives Online
- CollectionD0288 - Terence Wahl Collection
- Series003 - Great Northern Railway Company (U.S.)
- Subseries Level 1014 - Photographs
- Subseries Level 2001 - Railroads--Equipment and Supplies
- Subseries Level 3003 - Freight Cars
- 103 more...
- ItemTRWahl1079 - Great Northern Flat Car 64037, Bellingham, Washington, undated
- ItemTRWahl1080 - Great Northern Boxcar 38500, Bellingham, Washington, undated
- ItemTRWahl1084 - Great Northern Boxcar 43441, Bellingham, Washington, undated
- ItemTRWahl1085 - Great Northern Boxcar, Bellingham, Washington, undated
- ItemTRWahl0310 - Great Northern Boxcar 2539, Washington State, undated