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 3009 - Railroads - Servicing Facilities
- ItemWerkema604 - Burlington Northern icing platform at Pasco, Washington, in 1981.
- ItemWerkema605 - Burlington Northern icing platform at Pasco, Washington, in 1981.