- Woodward legacy jet engine fuel controls.
- Woodward Governor Company builder photo of their compensating type governor.
- WGC GOVERNOR SERIAL NUMBER 5185.
- TYLER'S IMPROVED WATER WHEEL TURBINE, CIRCA 1864.
- TOCCOA FALLS INSTITUTE, 1954.
- THE JAMES LEFFEL & COMPANY PAMPHLET K.
- THE JAMES LEFFEL & COMPANY PAMPHLET K.
- SN 5185. AUGUST 21, 1945.
- SN 5185. 9-5-1945 PAGE 2.
- SN 5185, SEPTEMBER 5, 1945.
- Serial Number 5185 Water Wheel Governor was resold 3 times upto 1945.
- PELTON WATER WHEEL COMPANY HISTORY.
- PELTON WATER WHEEL COMPANY HISTORY.
- PELTON WATER WHEEL COMPANY HISTORY.
- PAGE 7.