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
- 239 more...
- ItemChristianson000285 - Burlington Northern Diesel Locomotives Numbers 6780 and, 7843 at Breckenridge, Minnesota in 1980
- ItemChristianson000286 - Burlington Northern Diesel Locomotives Numbers 6792, 6726 and 6717 at Saint Paul, Minnesota in 1981
- ItemChristianson000287 - Burlington Northern Diesel Locomotives Numbers 6799, 6704 and, 6711 at Dayton's Bluff, Minnesota in 1981
- ItemChristianson000288 - Burlington Northern Diesel Locomotives Numbers 6799, 6704 and, 6711 at Dayton's Bluff, Minnesota in 1981
- ItemChristianson000289 - Burlington Northern Diesel Locomotives Numbers 6814 and, 6820 at Minneapolis, Minnesota in 1982
- ItemChristianson000290 - Burlington Northern Diesel Locomotives Numbers 6902 and 8026 at Minneapolis, Minnesota in 1981
- ItemChristianson000291 - Burlington Northern Diesel Locomotives Numbers 6902, 8026, 8041, 1406 and 1409 at Dayton's Bluff, Minnesota in 1981
- ItemChristianson000292 - Burlington Northern Diesel Locomotives Numbers 6902, 8026 and 8041 at Minneapolis, Minnesota in 1981
- ItemChristianson000293 - Burlington Northern Diesel Locomotives Numbers 6917 and 6918 at Fergus Falls, Minnesota in 1981
- 32 more...