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
- 59 more...
- ItemChristianson000092 - Burlington Northern diesel locomotives Number 768, Number 733, Number 2027, Number 790 at Fridley, Minnesota in 1981
- ItemChristianson000093 - Burlington Northern diesel locomotives Number 768, Number 783 at Carlisle, Minnesota in 1980
- ItemChristianson000094 - Burlington Northern diesel locomotives Number 774, Number 833, Number 784, Number 790 at Minneapolis, Minnesota in 1980
- ItemChristianson000095 - Burlington Northern diesel locomotives Number 774, Number 833, Number 784, Number 790 at Minneapolis, Minnesota in 1980
- ItemChristianson000096 - Burlington Northern diesel locomotives Number 774, Number 833, Number 784, Number 790 at Minneapolis, Minnesota in 1980
- ItemChristianson000097 - Burlington Northern diesel locomotives Number 774, Number 833, Number 784, Number 790 at Minneapolis, Minnesota in 1980
- ItemChristianson000098 - Burlington Northern diesel locomotives Number 774, Number 833, Number 784, Number 790 at Minneapolis, Minnesota in 1980
- ItemChristianson000099 - Burlington Northern diesel locomotive Number 774 at Minneapolis, Minnesota in 1980
- ItemChristianson0000100 - Burlington Northern diesel locomotive Number 778 at Minneapolis, Minnesota in 1981