Railroad Archives Online
- CollectionE0477 - BNSF Maps, Drawings and Records Collection
- Series003 - Great Northern Railway Company (U.S.)
- Subseries Level 1012 - Cartographic materials
- Subseries Level 2001 - Railroads - right of way
- 1113 more...
- ItemEBP1827 - Great Northern Right of Way and Track Map, Heimdal, North Dakota, undated
- ItemEBP1829 - Great Northern Right of Way and Track Map, Helena, Montana, undated
- ItemEBP1830 - Montana Central Railway Map , Helena, Montana, 1888
- ItemEBP1831 - Montana Central Railway Right of Way and Track Map, Helena, Montana, 1896
- ItemEBP1832 - Montana Central Railway Right of Way and Track Map, Helena, Montana, 1907
- ItemEBP1833 - Montana Central Railway Right of Way and Track Map, Helena, Montana, undated
- ItemEBP1835 - Map, Helena, Montana, 1887
- ItemEBP1836 - Great Northern Map, Helena, Montana, undated
- ItemEBP1837 - Montana Central Railway Right of Way and Track Map, Helena, Montana, undated
- 1894 more...