Railroad Archives Online
- D0153 - Doug Wingfield Collection
- Ro`yxat001 - Burlington Northern Railroad Company
- Ro`yxat-osti014 - Photographs
- 003 - Railroads--Buildings and Structures
- 010 - Miscellaneous Structures
- 4 more...
- Wingfield.115 - Libby Dam, Montana, 1970
- Wingfield.116 - Libby Dam, Montana, 1970
- Wingfield.117 - Libby Dam, Montana, 1970
- Wingfield.226 - Northern Pacific Tower at Marshall, Washington, 1970
- Wingfield.227 - Northern Pacific Tower at Marshall, Washington, 1970
- Wingfield.228 - Northern Pacific Tower at Marshall, Washington, 1970
- Wingfield.229 - Northern Pacific Tower at Marshall, Washington, 1970