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
- 23 more...
- ItemChristianson000056 - Burlington Northern diesel locomotive Number 306 at Minneapolis Junction, Minnesota in 1982
- ItemChristianson000057 - Burlington Northern diesel locomotives Number 307, Number 309 at Minneapolis, Minnesota in 1980
- ItemChristianson000058 - Burlington Northern diesel locomotive Number 308 at Northtown, Minnesota in 1981
- ItemChristianson000059 - Burlington Northern diesel locomotive Number 309 at Minneapolis, Minnesota in 1980
- ItemChristianson000060 - Burlington Northern diesel locomotives Number 306, Number 307, Number 309 and Number 6020 in Minneapolis, Minnesota in 1980
- ItemChristianson000061 - Burlington Northern diesel locomotive Number 311 at Fargo, North Dakota in 1981
- 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
- 36 more...