Railroad Archives Online
- FondsD0027 - Timothy Miller Collection
- Seri003 - Great Northern Railway Company (U.S.)
- Subseri009 - Engineering Records
- 008 - Physical plant drawing
- 008 - Tunnels
- 347 lebih...
- ItemStruc004576 - Great Northern Engineering Drawing, Flathead Tunnel, Montana, 1971
- ItemStruc004577 - Great Northern Engineering Drawing, Flathead Tunnel, Montana, 1975
- ItemStruc004578 - Great Northern Engineering Drawing, Flathead Tunnel, Montana, 1971
- ItemStruc004579 - Great Northern Engineering Drawing, Flathead Tunnel, Montana, 1971
- ItemStruc008938 - Great Northern Engineering Drawing, Flathead Tunnel, Montana, 1966