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
- 275 more...
- 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
- ItemChristianson000301 - Burlington Northern Diesel Locomotives Number 7031, Number 6608, Number 8065 and Number 8070 at Dayton's Bluff, Minnesota in 1981
- ItemChristianson000302 - Burlington Northern Diesel Locomotives Number 7107 and Number 7105 Grain Hoppers at Breckenridge, Minnesota in 1982
- ItemChristianson000303 - Burlington Northern Diesel Locomotives Number 7120, Number 6397 and Number 6903 with a Freight Manifest in 1981
- ItemChristianson000304 - Burlington Northern Diesel Locomotives Number 7120, Number 6397 and Number 6903 with a Freight Manifest in 1981
- 46 more...