Railroad Archives Online
- CollectionD0288 - Terence Wahl Collection
- Series003 - Great Northern Railway Company (U.S.)
- Subseries Level 1014 - Photographs
- Subseries Level 2004 - Railroad tracks
- Subseries Level 3001 - Railroad mainline
- 25 more...
- ItemTRWahl0853 - Great Northern Track, Bellingham, Washington, undated
- ItemTRWahl1055 - Great Northern Track, Bellingham, Washington, undated
- ItemTRWahl1091 - Great Northern Track, Bellingham, Washington, undated
- ItemTRWahl0131 - Great Northern Track, Scenic, Washington, undated
- ItemTRWahl0884 - Great Northern Track, Embro, Washington, undated