Railroad Archives Online
- CollectionD0288 - Terence Wahl Collection
- Series004 - Northern Pacific Railroad Company
- Subseries Level 1014 - Photographs
- Subseries Level 2004 - Railroad tracks
- Subseries Level 3001 - Railroad mainline
- ItemTRWahl0517 - Northern Pacific Track, Bellingham, Washington, undated
- ItemTRWahl0646 - Northern Pacific Track, Bellingham, Washington, undated
- ItemTRWahl0816 - Northern Pacific Track, Bellingham, Washington, undated
- ItemTRWahl0817 - Northern Pacific Track, Bellingham, Washington, undated
- ItemTRWahl0871 - Northern Pacific Track, Bellingham, Washington, undated
- ItemTRWahl0960 - Northern Pacific Track, Bellingham, Washington, undated
- ItemTRWahl0961 - Northern Pacific Track, Bellingham, Washington, undated
- 2 more...