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
- 443 more...
- ItemNPDepot0444 - Northern Pacific Depot at Pine River, Minnesota, 1983
- ItemNPDepot0445 - Northern Pacific Depot at Pingree, North Dakota, undated
- ItemNPDepot0446 - Northern Pacific Depot at Pingree, North Dakota, undated
- ItemNPDepot0447 - Northern Pacific Depot at Pingree, North Dakota, undated
- ItemNPDepot0448 - Northern Pacific Depot at Pingree, North Dakota, 1972
- ItemNPDepot0449 - Northern Pacific Depot at Pingree, North Dakota, 1982
- ItemNPDepot0450 - Northern Pacific Depot at Portland, Oregon, circa 1910
- ItemNPDepot0451 - Northern Pacific Depot at Portland, Oregon, circa 2000
- ItemNPDepot0452 - Northern Pacific Depot at Portland, Oregon, circa 1880
- 209 more...