Railroad Archives Online
- FondsE0357 - Wade J Stevenson Collection
- Série004 - Northern Pacific Railroad Company
- Sous-série014 - Photographs
- 001 - Railroads--Equipment and Supplies
- 001 - Steam Locomotives
- PièceGNRHS.55.14.44 - Northern Pacific Steam Locomotive 5116 in Washington State, undated
- PièceGNRHS.55.29.49 - Northern Pacific Steam Locomotive 1676 at Cle Elum, Washington, undated
- PièceGNRHS.55.29.50 - Northern Pacific Steam Locomotives at Livingston, Montana, undated