Railroad Archives Online
- CollectionD0335.2 - Northern Pacific Railway Historical Association Depot Photograph Collection
- Seriesex: 001 - Northern Pacific Railroad Company
- Subseries Level 1014 - Photographs
- Subseries Level 2003 - Railroads--Buildings and Structures
- Subseries Level 3002 - Depots and Freighthouses
- 420 more...
- ItemNPDepot0421 - The Northern Pacific Depot at Oakes, North Dakota, 1987
- ItemNPDepot0422 - The Northern Pacific Depot at Oakes, North Dakota, 1987
- ItemNPDepot0423 - The Northern Pacific Depot at Oakesdale, Washington, 1976
- ItemNPDepot0424 - The Northern Pacific Depot at Oakesdale, Washington, 1976
- ItemNPDepot0425 - The Northern Pacific Depot at Olympia, Washington, 1953
- ItemNPDepot0426 - The Northern Pacific Depot at Olympia, Washington, 1949
- ItemNPDepot0427 - The Northern Pacific Depot at Olympia, Washington, circa 1968
- ItemNPDepot0428 - The Northern Pacific Depot at Oriska, North Dakota, undated
- ItemNPDepot0429 - The Northern Pacific Depot at Oriska, North Dakota, 1968
- 232 more...