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
- 48 more...
- ItemNPDepot0049 - The Northern Pacific Depot at Billings, Montana, undated
- ItemNPDepot0050 - The Northern Pacific Depot at Billings, Montana, 1920s
- ItemNPDepot0051 - The Northern Pacific Depot at Billings, Montana, 1920s
- ItemNPDepot0052 - The Northern Pacific Depot at Billings, Montana, undated
- ItemNPDepot0053 - The Northern Pacific Depot at Billings, Montana, circa 1952
- ItemNPDepot0054 - The Northern Pacific Depot at Billings, Montana, 1960s
- ItemNPDepot0055 - The Northern Pacific Depot at Billings, Montana, 1996
- ItemNPDepot0056 - The Northern Pacific Depot at Bismarck, North Dakota, 1876
- ItemNPDepot0057 - The Northern Pacific Depot at Bismarck, North Dakota, 1883
- 604 more...