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
- 432 more...
- ItemChristianson000512 - Burlington Northern Diesel Locomotive 6819 at Minneapolis, Minnesota in 1982
- ItemChristianson000513 - Burlington Northern Diesel Locomotive 6830 at Galesburg, Illinois in 1979
- ItemChristianson000514 - Burlington Northern Diesel Locomotive 6920 at Minneapolis, Minnesota in 1982
- ItemChristianson000515 - Burlington Northern Diesel Locomotive 6928 at Sabin, Minnesota in 1982
- ItemChristianson000516 - Burlington Northern Diesel Locomotive 6928 at Barnesville, Minnesota in 1982
- ItemChristianson000517 - Burlington Northern Diesel Locomotive 7018 at Birds, Texas in 1980
- ItemChristianson000518 - Burlington Northern Diesel Locomotive 7066 at Minneapolis, Minnesota in 1979
- ItemChristianson000519 - Burlington Northern Diesel Locomotive 7066 at Minneapolis, Minnesota in 1979
- ItemChristianson000520 - Burlington Northern Diesel Locomotive 7132 at Minneapolis, Minnesota in 1981
- 118 more...