Railroad Archives Online
- CollectionD0027 - Timothy Miller Collection
- Series004 - Northern Pacific Railroad Company
- Subseries Level 1009 - Engineering Records
- Subseries Level 2008 - Physical plant drawing
- Subseries Level 3002 - Depots and Freighthouses
- 1144 more...
- ItemStruc006963 - Northern Pacific Engineering Drawing, Freight House at Helena, Montana, 1913
- ItemStruc006964 - Northern Pacific Engineering Drawing, Freight House at Brainerd, Minnesota, 1902
- ItemStruc006965 - Northern Pacific Engineering Drawing, Depot at Helena, Montana, 1956
- ItemStruc006966 - Northern Pacific Engineering Drawing, Depot at Helena, Montana, 1956
- ItemStruc006972 - Northern Pacific Engineering Drawing, Depot at Helena, Montana, 1957
- ItemStruc006981 - Northern Pacific Engineering Drawing, Depot at Helena, Montana, 1960
- ItemStruc006982 - Northern Pacific Engineering Drawing, Depot at Helena, Montana, 1960
- ItemStruc006983 - Northern Pacific Engineering Drawing, Depot at Helena, Montana, undated
- ItemStruc006984 - Northern Pacific Engineering Drawing, Depot at Helena, Montana, 1960
- 509 more...