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
- 259 more...
- ItemChristianson000330 - Burlington Northern Diesel Locomotive Number 8141 in Valley City, North Dakota in 1981
- ItemChristianson000331 - Burlington Northern Diesel Locomotives Numbers 8141, 8091, and 8129 in Dayton's Bluff, Minnesota in 1980
- ItemChristianson000332 - Burlington Northern Diesel Locomotive Number 8141 in Valley City, North Dakota in 1981
- ItemChristianson000333 - Burlington Northern Diesel Locomotives Numbers 8177, 7937 and 6902 in Dayton's Bluff, Minnesota in 1981
- ItemChristianson000334 - Burlington Northern Diesel Locomotives Numbers 8177, 7937, and 6902 in Newport, Minnesota in 1981
- ItemChristianson000335 - Burlington Northern Diesel Locomotives Numbers 993 and 995 in Wyndmere, North Dakota in 1981
- ItemChristianson000336 - Burlington Northern Train 200 in Valley City, North Dakota in 1981
- ItemChristianson000337 - Burlington Northern Train 23 in Luverne, North Dakota in 1981
- ItemChristianson000338 - Burlington Northern Train 80 on Gassman Coulee bridge near Minot, North Dakota in 1981
- 12 more...