Railroad Archives Online
- FondoD0288 - Terence Wahl Collection
- Serie003 - Great Northern Railway Company (U.S.)
- Sottoserie014 - Photographs
- 001 - Railroads--Equipment and Supplies
- 004 - Railroad Passenger Cars
- 76 in più...
- Unità documentariaTRWahl1067 - Great Northern Passenger Car 995, Bellingham, Washington, undated
- Unità documentariaTRWahl1088 - Great Northern Passenger Train, Bellingham, Washington, undated
- Unità documentariaTRWahl0061 - Great Northern Passenger Train, Trinidad, Washington, undated
- Unità documentariaTRWahl0062 - Great Northern Passenger Train, Voltage, Washington, undated
- Unità documentariaTRWahl0063 - Great Northern Passenger Train, eastern Washington, Washington, undated
- Unità documentariaTRWahl0320 - Great Northern Diesel Locomotive, South Bellingham, Washington, undated