Railroad Archives Online
- FondiD0027 - Timothy Miller Collection
- Serija003 - Great Northern Railway Company (U.S.)
- Podserija009 - Engineering Records
- 008 - Physical plant drawing
- 008 - Tunnels
- 259 more...
- DokumentStruc004488 - Great Northern Engineering Drawing, Flathead Tunnel, Montana, 1971
- DokumentStruc004489 - Great Northern Engineering Drawing, Flathead Tunnel, Montana, 1971
- DokumentStruc004490 - Great Northern Engineering Drawing, Flathead Tunnel, Montana, 1971
- DokumentStruc004491 - Great Northern Engineering Drawing, Flathead Tunnel, Montana, 1971
- DokumentStruc004492 - Great Northern Engineering Drawing, Flathead Tunnel, Montana, 1971
- DokumentStruc004493 - Great Northern Engineering Drawing, Flathead Tunnel, Montana, 1971
- DokumentStruc004494 - Great Northern Engineering Drawing, Flathead Tunnel, Montana, 1971
- DokumentStruc004495 - Great Northern Engineering Drawing, Flathead Tunnel, Montana, 1971
- DokumentStruc004496 - Great Northern Engineering Drawing, Flathead Tunnel, Montana, 1970
- 84 more...