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
- ItemTRWahl0035 - Great Northern Hopper Car 71566, Bellingham, Washington, undated
- ItemTRWahl0036 - Great Northern Hopper Car 71567, Bellingham, Washington, undated
- ItemTRWahl0041 - Great Northern Boxcar 39352, Bellingham, Washington, undated
- ItemTRWahl0042 - Great Northern Boxcar 41912, Bellingham, Washington, undated
- ItemTRWahl0067 - Great Northern Flat Car 67094, Bellingham, Washington, undated
- 103 more...