Railroad Archives Online
- CollectionD0036 - George Werkema Collection
- Series001 - Burlington Northern Railroad Company
- Subseries Level 1014 - Photographs
- Subseries Level 2001 - Railroads--Equipment and Supplies
- Subseries Level 3003 - Freight Cars
- ItemWerkema172 - Burlington Northern box car 950289 at the Northwest Railway Museum in Snoqualmie, Washington, in 2005.
- ItemWerkema218 - Burlington Northern box car number 281075 at Gibbon, Washington, in 1986.
- ItemWerkema219 - Burlington Northern box car number 281075 at Gibbon, Washington, in 1986.