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
- ItemWingfield.111 - Libby Dam, Montana, 1970
- ItemWingfield.112 - Libby Dam, Montana, 1970
- ItemWingfield.113 - Libby Dam, Montana, 1970
- ItemWingfield.114 - Libby Dam, Montana, 1970
- ItemWingfield.115 - Libby Dam, Montana, 1970
- ItemWingfield.116 - Libby Dam, Montana, 1970
- 5 more...