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
- 531 more...
- ItemChristianson000373 - Burlington Northern Diesel Locomotives Number 2249 and Number 1757 in Fergus Falls, Minnesota in 1980
- ItemChristianson000374 - Burlington Northern Diesel Locomotives Number 2249 and Number 1757 in Fergus Falls, Minnesota in 1980
- ItemChristianson000375 - Burlington Northern Diesel Locomotives Number 2296 and Number 6343 in Fort Worth, Texas in 1981
- ItemChristianson000451 - Burlington Northern Diesel Locomotives Number 6253, Number 6249 and Number 3015 at Dayton's Bluff, Minnesota in 1980
- ItemChristianson000452 - Burlington Northern Diesel Locomotive Number 6262 in 1981
- ItemChristianson000453 - Burlington Northern Diesel Locomotives Number 6384, Number 8136, Number 8101, Number 2705, Number 7833 and Number 6592 at Saint Paul, Minnesota in 1981
- ItemChristianson000454 - Burlington Northern Diesel Locomotive Number 6598 at Fort Worth, Texas in 1981
- ItemChristianson000455 - Burlington Northern Diesel Locomotives Number 6358, Number 5745 and Two Unidentified locomotives at Minneapolis, Minnesota in 1982
- ItemChristianson000456 - Burlington Northern Diesel Locomotives Number 6377 and Number 6801 at Fridley, Minnesota in 1981
- 19 more...