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
- 236 more...
- ItemChristianson000282 - Burlington Northern Diesel Locomotives Numbers 6759 and, 6770 at Dayton's Bluff, Minnesota in 1980
- ItemChristianson000283 - Burlington Northern Diesel Locomotives Numbers 6770 and, 7887 at Staples, Minnesota in 1981
- ItemChristianson000284 - Burlington Northern Diesel Locomotives Numbers 6771 and, 6703 at Saint Paul, Minnesota in 1981
- 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
- 35 more...