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
- 448 more...
- ItemChristianson000528 - Burlington Northern Diesel Locomotive 7880 at Saint Paul, Minnesota in 1980
- ItemChristianson000529 - Burlington Northern Diesel Locomotive 7891 in 1981
- ItemChristianson000530 - Burlington Northern Diesel Locomotive 7893 at Saint Paul, Minnesota in 1980
- ItemChristianson000531 - Burlington Northern Diesel Locomotive 7893 at Saint Paul, Minnesota in 1980
- ItemChristianson000532 - Burlington Northern Diesel Locomotive 7901 at Saint Cloud, Minnesota in 1981
- ItemChristianson000533 - Burlington Northern Diesel Locomotive 7901 at Saint Paul, Minnesota in 1981
- ItemChristianson000534 - Burlington Northern Diesel Locomotive 7904 at Minneapolis, Minnesota in 1981
- ItemChristianson000535 - Burlington Northern Diesel Locomotive 7909 at Minneapolis, Minnesota in 1980
- ItemChristianson000536 - Burlington Northern Diesel Locomotive 7909 at Minneapolis, Minnesota in 1980
- 102 more...