Railroad Archives Online
- CollectionD0504b - Al Christianson Collection - Friends of the Burlington Northern Railroad
- Series001 - Burlington Northern Railroad Company
- Subseries Level 1014 - Photographs
- Subseries Level 2001 - Railroads--Equipment and Supplies
- Subseries Level 3002 - Diesel Locomotives
- 384 more...
- ItemChristianson000439 - Burlington Northern diesel locomotive 6016 at Superior, Wisconsin in 1981
- ItemChristianson000440 - Burlington Northern diesel locomotive 6113 at Tilden Junction, Minnesota in 1981
- ItemChristianson000441 - Burlington Northern diesel locomotive 6114 at Superior, Wisconsin in 1981
- ItemChristianson000442 - Burlington Northern diesel locomotive 6118 at Minneapolis, Minnesota in 1981
- ItemChristianson000443 - Burlington Northern diesel locomotive 6078 at Fort Worth, Texas in 1981
- ItemChristianson000444 - Burlington Northern diesel locomotive 6217 at Golden, Colorado in 1981
- ItemChristianson000445 - Burlington Northern diesel locomotive 6218 at Denver, Colorado in 1981
- ItemChristianson000446 - Burlington Northern diesel locomotive 6228 at Denver, Colorado in 1981
- ItemChristianson000447 - Burlington Northern diesel locomotive 6234 at Golden, Colorado in 1981
- 166 more...