Railroad Archives Online
- CollectionD0288 - Terence Wahl Collection
- Series004 - Northern Pacific Railroad Company
- Subseries Level 1014 - Photographs
- Subseries Level 2003 - Railroads--Buildings and Structures
- Subseries Level 3003 - Maintenance Facilities
- ItemTRWahl0486 - Northern Pacific Engine House, Bellingham, Washington, undated
- ItemTRWahl0518 - Northern Pacific Engine House, Bellingham, Washington, undated
- ItemTRWahl0568 - Northern Pacific Engine House with Steam Locomotive 1380, Bellingham, Washington, undated
- ItemTRWahl0590 - Northern Pacific Engine House, Bellingham, Washington, undated