Railroad Archives Online
- ArkivD0027 - Timothy Miller Collection
- Serie003 - Great Northern Railway Company (U.S.)
- Underserie009 - Engineering Records
- 008 - Physical plant drawing
- 008 - Tunnels
- 263 mer...
- ObjektStruc004492 - Great Northern Engineering Drawing, Flathead Tunnel, Montana, 1971
- ObjektStruc004493 - Great Northern Engineering Drawing, Flathead Tunnel, Montana, 1971
- ObjektStruc004494 - Great Northern Engineering Drawing, Flathead Tunnel, Montana, 1971
- ObjektStruc004495 - Great Northern Engineering Drawing, Flathead Tunnel, Montana, 1971
- ObjektStruc004496 - Great Northern Engineering Drawing, Flathead Tunnel, Montana, 1970
- ObjektStruc004497 - Great Northern Engineering Drawing, Flathead Tunnel, Montana, 1971
- ObjektStruc004498 - Great Northern Engineering Drawing, Flathead Tunnel, Montana, 1971
- ObjektStruc004499 - Great Northern Engineering Drawing, Flathead Tunnel, Montana, 1971
- ObjektStruc004500 - Great Northern Engineering Drawing, Flathead Tunnel, Montana, 1971
- 80 mer...