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 3002 - Diesel Locomotives
- ItemWingfield.1 - Diesel Locomotives Great Northern 2524 and Northern Pacific 3604 at Scribner, Washington, 1970
- ItemWingfield.11 - Diesel Locomotives Burlington Northern 4264 and 694 with Southern Pacific 7806 at Trego, Montana, 1970
- ItemWingfield.12 - Diesel Locomotives Burlington Northern 4264 and 694 with Southern Pacific 7806 at Trego, Montana, 1970
- ItemWingfield.13 - Burlington Northern Diesel Locomotives 676 at Whitefish, Montana, 1970
- ItemWingfield.14 - Burlington Northern Diesel Locomotives 676, 1520 at Whitefish, Montana, 1970
- ItemWingfield.15 - Burlington Northern Diesel Locomotive 700 at Whitefish, Montana, 1970
- ItemWingfield.16 - Burlington Northern Diesel Locomotives 9700, 9713, 9709 at Whitefish, Montana, 1970
- ItemWingfield.17 - Burlington Northern Diesel Locomotives 9700, 9713, 9709 at Eureka, Montana, 1970
- 72 more...