Railroad Archives Online
- ΑρχείοD0288 - Terence Wahl Collection
- 004 - Northern Pacific Railroad Company
- Υποσειρά014 - Photographs
- 003 - Railroads--Buildings and Structures
- 003 - Maintenance Facilities
- ΤεκμήριοTRWahl0486 - Northern Pacific Engine House, Bellingham, Washington, undated
- ΤεκμήριοTRWahl0518 - Northern Pacific Engine House, Bellingham, Washington, undated
- ΤεκμήριοTRWahl0568 - Northern Pacific Engine House with Steam Locomotive 1380, Bellingham, Washington, undated
- ΤεκμήριοTRWahl0590 - Northern Pacific Engine House, Bellingham, Washington, undated