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
- 173 more...
- ItemChristianson000269 - Burlington Northern Diesel Locomotives Number 6708 and Number 6754 at Newport, Minnesota, 1980
- ItemChristianson000270 - Burlington Northern Diesel Locomotives Number 6709, Number 6754 and Number 6752 at Chemolite, Minnesota, 1982
- ItemChristianson000271 - Burlington Northern Diesel Locomotives Number 6709, Number 6754 and Number 6752 at Saint Paul, Minnesota, 1982
- ItemChristianson000272 - Burlington Northern Diesel Locomotives Number 6710 and Number 6701 at Cottage Grove, Minnesota, 1982
- ItemChristianson000273 - Burlington Northern Diesel Locomotives Number 6716, Number 777 and Number 774 at Saint Cloud, Minnesota, 1981
- ItemChristianson000274 - Burlington Northern Diesel Locomotives Number 6708, Number 6754 and Number 6726 at Newport, Minnesota, 1980
- ItemChristianson000275 - Burlington Northern Diesel Locomotives Number 6708, Number 6754 and Number 6726 at Newport, Minnesota, 1980
- ItemChristianson000226 - Burlington Northern Diesel Locomotive Number 5095, Missouri Pacific Diesel Locomotive Number 6060 and another Missouri Pacific Diesel at Kansas City, Missouri in 1980
- ItemChristianson000227 - Burlington Northern Diesel Locomotive Number 5095, Missouri Pacific Diesel Locomotive Number 6060 and another Missouri Pacific Diesel at Kansas City, Missouri in 1980
- 23 more...