Railroad Archives Online
- FondsD0288 - Terence Wahl Collection
- Série003 - Great Northern Railway Company (U.S.)
- Sous-série014 - Photographs
- 003 - Railroads--Buildings and Structures
- 003 - Maintenance Facilities
- PièceTRWahl0327 - Great Northern Turntable, Bellingham, Washington, undated
- PièceTRWahl0604 - Great Northern Turntable, Bellingham, Washington, undated
- PièceTRWahl0814 - Great Northern Turntable, Bellingham, Washington, undated
- PièceTRWahl0815 - Great Northern Maintenance Faciliities, Bellingham, Washington, undated