Railroad Archives Online
- FondsD0288 - Terence Wahl Collection
- Série002 - Chicago, Milwaukee, St. Paul, and Pacific Railroad Company
- Sous-série014 - Photographs
- 003 - Railroads--Buildings and Structures
- 001 - Bridges
- PièceTRWahl0078 - Milwaukee Road Bridge, Bellingham, Washington, undated
- PièceTRWahl0079 - Milwaukee Road Bridge, Bellingham, Washington, undated