Railroad Archives Online
- ArquivoE0357 - Wade J Stevenson Collection
- Série002 - Great Northern Railway Company (U.S.)
- Subsérie014 - Photographs
- 001 - Railroads--Equipment and Supplies
- 004 - Railroad Passenger Cars
- ItemGNRHS.55.02.02 - Great Northern Observation Car 1192, "Flathead River", undated
- ItemGNRHS.55.02.03 - Great Northern Observation Car 1192, "Flathead River", undated
- ItemGNRHS.55.02.04 - Great Northern Observation Car 1192, "Flathead River", undated
- ItemGNRHS.55.02.31 - Great Northern Pullman Coach in Great Northern Livery in Washington State, undated
- ItemGNRHS.55.06.21 - Great Northern Great Dome 1392, "Mountain View" in Washington State, undated
- ItemGNRHS.55.08.05 - Great Northern Cafe Coach in Washington State, undated
- ItemGNRHS.55.08.13 - Great Northern Observation Car in Saint Paul, Minnsota, undated
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