Railroad Archives Online
- FondoE0357 - Wade J Stevenson Collection
- Serie010 - Other Railroads
- Sottoserie014 - Photographs
- 001 - Railroads--Equipment and Supplies
- 004 - Railroad Passenger Cars
- Unità documentariaGNRHS.55.03.22 - Chicago, Burlington and Quincy Railroad Great Dome 1385 at North Portal, Seattle, Washington, undated
- Unità documentariaGNRHS.55.04.38 - Pennsylvania Railroad Observation Car 7152 "William Chamberlain Patterson" in Washington State, undated