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 3005 - Maintenance of Way cars
- ItemTRWahl0091 - Great Northern Inspection Car 84, Bellingham, Washington, undated
- ItemTRWahl0092 - Great Northern Inspection Car 84, Bellingham, Washington, undated
- ItemTRWahl0321 - Great Northern Speeder with Trailer, South Bellingham, Washington, undated
- ItemTRWahl0323 - Great Northern Crane R1841, South Bellingham, Washington, undated
- ItemTRWahl0333 - Great Northern Piledriver R1840, Bellingham, Washington, undated
- ItemTRWahl0354 - Great Northern Ballast Plow X1710, Bellingham, Washington, undated
- ItemTRWahl0355 - Great Northern Ballast Plow X1710, Bellingham, Washington, undated
- 60 more...