Railroad Archives Online
- CollectionE0316 - Robert W. Downing Collection
- Series001 - Burlington Northern Railroad Company
- Subseries Level 1012 - Cartographic Materials
- Subseries Level 2001 - Maps
- 5 more...
- ItemJSRH94990 - Burlington Northern Railroad Map in South Dakota
- ItemJSRH94992 - Burlington Northern Railroad Map in Wyoming
- ItemJSRH94994 - Burlington Northern Railroad Map in Montana
- ItemJRSH94995 - Burlington Northern Railroad Map in Nebraska/Kansas
- ItemJSRH94998 - Burlington Northern Railroad Map in Colorado
- ItemJSRH95000 - Burlington Northern Railroad Map in Oregon/California
- ItemJSRH95002 - Burlington Northern Railroad Map in Minnesota
- ItemJSRH95003 - Burlington Northern Railroad Map in Illinois