Railroad Archives Online
- ArquivoD0288 - Terence Wahl Collection
- Série004 - Northern Pacific Railroad Company
- Subsérie014 - Photographs
- 004 - Railroad tracks
- 001 - 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
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