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
- 273 more...
- ItemChristianson000344 - Burlington Northern Diesel Locomotives Numbers 1403, 2094, and 2001 in Coon Rapids, Minnesota in 1981
- ItemChristianson000345 - Burlington Northern Diesel Locomotives Numbers 1406 and 2035 in Fargo, North Dakota in 1981
- ItemChristianson000346 - Burlington Northern Diesel Locomotive Number 1413 in Saint Cloud, Minnesota in 1981
- ItemChristianson000347 - Burlington Northern Diesel Locomotives Numbers 1422 and 1869 in Portland, Oregon in 1982
- ItemChristianson000348 - Burlington Northern Diesel Locomotive Number 1550 in Minneapolis, Minnesota in 1981
- ItemChristianson000349 - Burlington Northern Diesel Locomotives Numbers 1555, 790 and 771 in Fridley, Minnesota in 1981
- ItemChristianson000350 - Burlington Northern Diesel Locomotive Number 1571 in Fort Madison, Iowa in 1982