Railroad Archives Online
- CollectionD0027 - Timothy Miller Collection
- Series003 - Great Northern Railway Company (U.S.)
- Subseries Level 112 - Cartographic materials
- Subseries Level 22 - Plats
- 1064 more...
- ItemPlat012534 - Plat Map of Great Northern Facilities at Helena, Montana, 1960
- ItemPlat012535 - Plat Map of Great Northern Facilities at Helena, Montana, 1960
- ItemPlat012536 - Plat Map of Great Northern Facilities at Helena, Montana, 1960
- ItemPlat012537 - Plat Map of Great Northern Facilities at Helena, Montana, 1960
- ItemPlat012538 - Plat Map of Great Northern Facilities at Helena, Montana, 1960
- ItemPlat012539 - Plat Map of Great Northern Facilities at Helena, Montana, 1960
- ItemPlat012540 - Plat Map of Great Northern Facilities at Helena, Montana, 1913
- ItemPlat012541 - Plat Map of Great Northern Facilities at Helena, Montana, 1913
- ItemPlat012550 - Plat Map of Great Northern Facilities at Hendrix , Washington, undated
- 681 more...