Railroad Archives Online
- CollectionD0153 - Doug Wingfield Collection
- Series001 - Burlington Northern Railroad Company
- Subseries Level 1014 - Photographs
- Subseries Level 2003 - Railroads--Buildings and Structures
- Subseries Level 3010 - Miscellaneous Structures
- 5 more...
- ItemWingfield.116 - Libby Dam, Montana, 1970
- ItemWingfield.117 - Libby Dam, Montana, 1970
- ItemWingfield.226 - Northern Pacific Tower at Marshall, Washington, 1970
- ItemWingfield.227 - Northern Pacific Tower at Marshall, Washington, 1970
- ItemWingfield.228 - Northern Pacific Tower at Marshall, Washington, 1970
- ItemWingfield.229 - Northern Pacific Tower at Marshall, Washington, 1970