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
- 131 more...
- 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
- ItemChristianson000206 - Burlington Northern Diesel Locomotives Numbers 5534 and 5839, and St. Louis-San Francisco Railway (Frisco) Diesel Locomotive at Omaha, Nebraska in 1979
- ItemChristianson000207 - Burlington Northern Diesel Locomotives Numbers 5550 and 7807 at Sterling, Colorado in 1981
- ItemChristianson000208 - Burlington Northern Diesel Locomotive Number 5585 at Fort Worth, Texas in 1981
- ItemChristianson000209 - Burlington Northern Diesel Locomotives Numbers 5617 and 6156 at Saint Paul, Minnesota in 1980
- ItemChristianson000210 - Burlington Northern Diesel Locomotives Numbers 5627 and 5637 and 5673 at Daytons Bluff, Minnesota in 1980
- 40 more...