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
- 380 more...
- ItemChristianson000435 - Burlington Northern diesel locomotive 5944 at Fergus Falls, Minnesota in 1979
- ItemChristianson000436 - Burlington Northern diesel locomotive 6022 at Saint Paul, Minnisota in 1981
- ItemChristianson000437 - Burlington Northern diesel locomotive 6049 at Beardstown, Illinois in 1979
- ItemChristianson000438 - Burlington Northern diesel locomotive 6054 at Saint Paul, Minnesota in 1981
- 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
- 170 more...