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
- 29 more...
- ItemChristianson000062 - Burlington Northern diesel locomotive Number 318 at unknown location in 1979
- ItemChristianson000063 - Burlington Northern diesel locomotive Number 388 at Albany, Oregon in 1982
- ItemChristianson000064 - Burlington Northern diesel locomotive Number 393 at Northtown, Minnesota in 1980
- ItemChristianson000065 - Burlington Northern diesel locomotives Number 393 and Number 394 at Northtown, Minnesota in 1981
- ItemChristianson000066 - Burlington Northern diesel locomotive Number 435 at Kansas City, Missouri in 1980
- ItemChristianson000067 - Burlington Northern diesel locomotives Number 436 and Number 555 at Kansas City, Missouri in 1980
- ItemChristianson000068 - Burlington Northern diesel locomotive Number 451 at Minneapolis, Minnesota in 1982
- ItemChristianson000069 - Burlington Northern diesel locomotives Number 452, Number 158, and Number 1405 at Minneapolis, Minnesota in 1980
- ItemChristianson000070 - Burlington Northern diesel locomotive Number 452 at Saint Paul, Minnesota in 1979
- 30 more...