Railroad Archives Online
- CollectionD0036 - George Werkema Collection
- Series004 - Northern Pacific Railroad Company
- Subseries Level 1014 - Photographs
- Subseries Level 2003 - Railroads--Buildings and Structures
- Subseries Level 3004 - Maintenance of Way support
- ItemWerkema599 - Burlington Northern buildings at Connell, Washington, in 1986.
- ItemWerkema600 - Burlington Northern telephone shelter at Cunningham, Washington, in 1986.
- ItemWerkema602 - Burlington Northern telephone shelter at Eltopia, Washington, in 1986.