Railroad Archives Online
- D0036 - George Werkema Collection
- Ro`yxat001 - Burlington Northern Railroad Company
- Ro`yxat-osti014 - Photographs
- 001 - Railroads--Equipment and Supplies
- 004 - Railroad Passenger Cars
- Werkema378 - Burlington Northern railway post office car 1931 in 1973.
- img322 - Burlington Northern Passenger Car at Denver, Colorado, 1981
- img323 - Burlington Northern Passenger Car at Denver, Colorado, 1981
- img324 - Burlington Northern Passenger Car at Denver, Colorado, 1985