Railroad Archives Online
- FondsD0027 - Timothy Miller Collection
- Série004 - Northern Pacific Railroad Company
- Sous-série009 - Engineering Records
- 008 - Physical plant drawing
- 002 - Depots and Freighthouses
- 531 en plus...
- PièceStruc005267 - Northern Pacific Engineering Drawing, Operator's House at Bridge 72.2 at Hoquiam, Washington, 1964
- PièceStruc005290 - Northern Pacific Engineering Drawing, Freight House at Walla Walla, Washington, 1965
- PièceStruc005291 - Northern Pacific Engineering Drawing, Freight House at Walla Walla, Washington, 1965
- PièceStruc005301 - Northern Pacific Engineering Drawing, Unloading Platform at Olympia, Washington, 1962
- PièceStruc005302 - Northern Pacific Engineering Drawing, Depot at Olympia, Washington, 1966
- PièceStruc005303 - Northern Pacific Engineering Drawing, Depot at Olympia, Washington, 1965
- PièceStruc005304 - Northern Pacific Engineering Drawing, Depot at Olympia, Washington, 1965
- PièceStruc005305 - Northern Pacific Engineering Drawing, Depot at Olympia, Washington, 1966
- PièceStruc005306 - Northern Pacific Engineering Drawing, Depot at Olympia, Washington, 1965
- 1122 en plus...