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
- 196 more...
- ItemChristianson000242 - Burlington Northern Diesel Locomotive Number 6022 with Freight Cars at Saint Paul, Minnesota in 1981
- ItemChristianson000243 - Burlington Northern Diesel Locomotives Number 6108 and Number 6016 with Freight Cars at Minneapolis, Minnesota in 1982
- ItemChristianson000244 - Burlington Northern Diesel Locomotives Number 6108 and Number 6016 with Freight Cars at Minneapolis, Minnesota in 1982
- ItemChristianson000245 - Burlington Northern Diesel Locomotives Number 6113, Number 773 and another Burlington Northern Diesel at Tilden Junction, Minnesota in 1981
- ItemChristianson000246 - Burlington Northern Diesel Locomotives Number 6170 and Number 6057 with a Boxcar at Fremont, Nebraska in 1981
- ItemChristianson000247 - Burlington Northern Diesel Locomotive Number 6184 with Covered Hoppers at Kearney, Nebraska in 1981
- ItemChristianson000248 - Burlington Northern Diesel Locomotive Number 6184 with Covered Hoppers near Kearney, Nebraska in 1981
- ItemChristianson000249 - Burlington Northern Diesel Locomotive Number 6184 with a Frisco Covered Hopper near Kearney, Nebraska in 1981
- ItemChristianson000250 - Burlington Northern Diesel Locomotive Number 6234 with Freight Cars at Golden, Colorado in 1981