Railroad Archives Online
- CollectionD0153 - Doug Wingfield Collection
- Series001 - Burlington Northern Railroad Company
- Subseries Level 1014 - Photographs
- Subseries Level 2001 - Railroads--Equipment and Supplies
- Subseries Level 3004 - Railroad Passenger Cars
- ItemWingfield.3 - Great Northern Passenger Car 478 at Eureka, Montana, 1970
- ItemWingfield.55 - Great Northern Passenger Car 1111 at Flathead Tunnel, Montana, 1970
- ItemWingfield.56 - Great Northern Coach 1212 (part of the Burlington Northern since March 1, 1970) at Whitefish, Montana, October 31, 1970.