- The Black Point Legacy. 1888-2005.
- The Black Point Legacy. 1888-2005.
- The Black Point Legacy History Book.
- Brad's Diesel Engine History Project.
- Page 3. Information courtesy of the Diesel Progress North American KHL Group Americas LLC.
- Picture credit and Information courtesy of Diesel Progress North American KHL Group Americas LLC.
- Page 2. Information courtesy of Diesel Progress North American KHL Group Americas LLC.
- The Arrow A54 Gaseous Fuel Engine history.
- WOODWARD HYDRO CONTROL SYSTEMS SINCE 1870.
- MR APRIL 1967 AD.
- MR 4-1967 AD.
- MR APRIL 1967.
- Model Railroader. April 1967.
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