- The Woodward T700/CT7 project history.
- COTTA TRANSMISION ROCKFORD, ILLINOIS, CIRCA 1919.
- COTTA TRANSMISION COMPANY.
- EMERSON-BRANTINGHAM COMPANY
- EMERSON-BRANTINGHAM COMPANY
- A vintage machine shop manufacturing history project.
- Brad's vintage gas engine governor project.
- Tractor and Gas Engine Review.
- A vintage machine shop manufacturing history project.
- Tractor and Gas Engine Review
- Brad's steam engine history project. Page 3.
- ELETRO-MOTIVE COMPANY DIESEL ELECTRIC LOCOMOTIVE HISTORY.
- RAILWAY AGE
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- ELETRO-MOTIVE COMPANY DIESEL ELECTRIC LOCOMOTIVE HISTORY.