- New Hydro-Electric Plant on the Kern River. Page 5.
- The Engineering Journal Magazine Elmer Woodward would have loved to read.
- Water Powers of Canada.
- 9
- The New Super Poweplant.
- THE JAMES LEFFEL & COMPANY HISTORY PROJECT.
- 7. Barns Tool Grinder Rockford. 1887 ad.
- New Hydro-Electric Plant on the Kern River.
- Great Western Power Company System History. 5.
- Leffels' Improved Turbine Water Wheel advertisement from June 1887. Page 6.
- ''WE LOVE THINGS MECHANICAL"
- Published by the James Leffel & Company.
- We Love Hydro Power History!!!
- La Gabelle Hydro Power Plant Picture 2.
- The New Super Poweplant. 4.