Railroad Archives Online
- CollectionD0335.2 - Northern Pacific Railway Historical Association Depot Photograph Collection
- Series004 - Northern Pacific Railroad Company
- Subseries Level 1014 - Photographs
- Subseries Level 2003 - Railroads--Buildings and Structures
- Subseries Level 3002 - Depots and Freighthouses
- 421 more...
- ItemNPDepot0422 - Northern Pacific Depot at Oakes, North Dakota, 1987
- ItemNPDepot0423 - Northern Pacific Depot at Oakesdale, Washington, 1976
- ItemNPDepot0424 - Northern Pacific Depot at Oakesdale, Washington, 1976
- ItemNPDepot0425 - Northern Pacific Depot at Olympia, Washington, 1953
- ItemNPDepot0426 - Northern Pacific Depot at Olympia, Washington, 1949
- ItemNPDepot0427 - Northern Pacific Depot at Olympia, Washington, circa 1968
- ItemNPDepot0428 - Northern Pacific Depot at Oriska, North Dakota, undated
- ItemNPDepot0429 - Northern Pacific Depot at Oriska, North Dakota, 1968
- ItemNPDepot0430 - Northern Pacific Depot at Palouse, Washington, 1976
- 231 more...