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
- 70 more...
- ItemChristianson000182 - Burlington Northern Diesel Locomotives Number 1409, Number 1410 at Daytons Bluff, Minnesota in 1981
- ItemChristianson000183 - Burlington Northern Diesel Locomotives Number 1550, Number 6049, Number 1867 at Minneapolis, Minnesota in 1982
- ItemChristianson000184 - Burlington Northern Diesel Locomotives Number 1550, Number 6049, Number 1867 at Minneapolis, Minnesota in 1982
- ItemChristianson000185 - Burlington Northern Diesel Locomotives Number 1619, Number 1592 at Newport, Minnesota in 1981
- ItemChristianson000186 - Burlington Northern Diesel Locomotives Number 768, Number 783, Number 733, Number 1824 at Carlisle, Minnesota in 1980
- ItemChristianson000187 - Burlington Northern Diesel Locomotives Number 1355 and 3 Unidentified F Units at Fergus Falls, Minnesota in 1980
- ItemChristianson000188 - Burlington Northern Diesel Locomotives Number 2090, Number 2008, and 2 Unidentified GP Diesel Locomotives at Breckenridge, Minnesota in 1980
- ItemChristianson000189 - Burlington Northern Diesel Locomotives Number 2092, Number 2032, Number 2006, Number 2001 at Minneapolis, Minnesota in 1980
- ItemChristianson000190 - Burlington Northern Diesel Locomotives Number 2233, Number 2242 at Fremont, Nebraska in 1981
- 10 more...