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
- 247 more...
- ItemChristianson000293 - Burlington Northern Diesel Locomotives Numbers 6917 and 6918 at Fergus Falls, Minnesota in 1981
- ItemChristianson000294 - Burlington Northern Diesel Locomotives Numbers 6917 and 6918 at Fergus Falls, Minnesota in 1981
- ItemChristianson000295 - Burlington Northern Diesel Locomotives Numbers 6928 and 2015 at Barnesville, Minnesota in 1982
- ItemChristianson000296 - Burlington Northern Diesel Locomotives Numbers 6928 and 2015 south of Moorhead, Minnesota in 1982
- ItemChristianson000297 - Burlington Northern Diesel Locomotives Numbers 6928 and 2015 at Moorhead, Minnesota in 1982
- ItemChristianson000298 - Burlington Northern Diesel Locomotives Numbers 6928 and 2015 at Rothsay, Minnesota in 1982
- ItemChristianson000299 - Burlington Northern Diesel Locomotives Numbers 6928 and 2015 at Barnesville, Minnesota in 1982
- ItemChristianson000300 - Burlington Northern Diesel Locomotives Numbers 6928 and 2015 at Barnesville, Minnesota in 1982
- ItemChristianson000326 - Burlington Northern Diesel Locomotives Numbers 8047, 2737, and 2738 in Dayton's Bluff, Minnesota in 1981
- 24 more...