Railroad Archives Online
- CollectionD0063 - Walter W. Ainsworth Collection
- Series001 - Burlington Northern Railroad Company
- Subseries Level 1014 - Photographs
- Subseries Level 2001 - Railroads--Equipment and Supplies
- Subseries Level 3005 - Maintenance of Way cars
- ItemWWAPC0701 - Burlington Northern Railroad work train at Maple Valley, Washington, circa 1986.
- ItemWWAPC0702 - Burlington Northern Railroad work train at Maple Valley, , circa 1986.