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
- 126 more...
- ItemChristianson000047 - Burlington Northern Diesel Locomotive Number 170 at Minneapolis, Minnesota In 1979
- ItemChristianson000048 - Burlington Northern Diesel Locomotives Number 170, Number 452 and Number 305 at Minneapolis, Minnesota In 1979
- ItemChristianson000049 - Burlington Northern Diesel Locomotive Number 211 at Minneapolis, Minnesota In 1979
- ItemChristianson000050 - Burlington Northern Diesel Locomotive Number 211 at Minneapolis, Minnesota In 1979
- ItemChristianson000201 - Burlington Northern Diesel Locomotives Numbers 5504 and 7029, and a Milwaukee Road Diesel Locomotive at Minneapolis, Minnesota in 1979
- ItemChristianson000202 - Burlington Northern Diesel Locomotives Numbers 5520 and 5562 at Sterling, Colorado in 1981
- ItemChristianson000203 - Burlington Northern Diesel Locomotives Numbers 5534 and 5839 and 5405, and St. Louis-San Francisco Railway (Frisco) Diesel Locomotive at Omaha, Nebraska in 1979
- ItemChristianson000204 - Burlington Northern Diesel Locomotives Numbers 5534 and 5839 and 5405, and St. Louis-San Francisco Railway (Frisco) Diesel Locomotive at Omaha, Nebraska in 1979
- ItemChristianson000205 - Burlington Northern Diesel Locomotives Numbers 5534 and 5839, and St. Louis-San Francisco Railway (Frisco) Diesel Locomotive at Omaha, Nebraska in 1979
- 70 more...