Railroad Archives Online
- ФондыD0153 - Doug Wingfield Collection
- 001 - Burlington Northern Railroad Company
- 014 - Photographs
- 001 - Railroads--Equipment and Supplies
- 011 - Railroad cars self-propelled
- Wingfield.44 - Great Northern Rail Diesel Car 2350 at Great Falls, Montana, 1971
- Wingfield.45 - Great Northern Rail Diesel Car 2350 at Great Falls, Montana, 1971