- TYLER'S IMPROVED WATER WHEEL TURBINE, CIRCA 1864.
- TOCCOA FALLS INSTITUTE, 1954.
- This catalogue was sent with the Woodward letter dated 11-1926.
- THE JAMES LEFFEL AND COMPANY ADVERTISEMENT.
- THE JAMES LEFFEL & COMPANY PAMPHLET K.
- THE JAMES LEFFEL & COMPANY PAMPHLET K.
- SPECIFICATIONS FOR SIZE D WATER WHEEL GOVERNOR.
- SPECIFICATIONS FOR SIZE C WATER WHEEL GOVERNOR.
- 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.
- SAMSON WATER TURBINE CATALOGUE.
- SAMSON TURBINE CATALOGUE.
- resolver