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
- 257 more...
- ItemNPDepot0258 - The Northern Pacific Depot at Helena, Montana, undated
- ItemNPDepot0259 - The Northern Pacific Depot at Helena, Montana, undated
- ItemNPDepot0260 - The Northern Pacific Depot at Helena, Montana, undated
- ItemNPDepot0261 - The Northern Pacific Depot at Helena, Montana, undated
- ItemNPDepot0262 - The Northern Pacific Depot at Helena, Montana, 1973
- ItemNPDepot0263 - The Northern Pacific Depot at Henning, Minnesota, 1969
- ItemNPDepot0264 - The Northern Pacific Depot at Hinckley, Minnesota, undated
- ItemNPDepot0265 - The Northern Pacific Depot at Hinckley, Minnesota, undated
- ItemNPDepot0266 - The Northern Pacific Depot at Hoquiam, Washington, undated
- 395 more...