- We Love Hydro Power History!!!
- Water Powers of Canada. 2.
- Water Powers of Canada.
- The Spirit of Interconnection.
- The New Super Poweplant. 5.
- The New Super Poweplant. 4.
- The New Super Poweplant.
- THE JAMES LEFFEL & COMPANY HISTORY PROJECT.
- The Engineering Journal Magazine Elmer Woodward would have loved to read.
- The Engineering Journal Magazine Elmer Woodward would have loved to read.
- Published by the James Leffel & Company.
- Page 9. WOODWARD GOVERNOR APPLICATION!!!
- Page 21.
- Page 14. WOODWARD MECHANICAL GOVERNOR APPLICATION,
- PAGE 1. PRINTED IN 1887 BY THE JAMES LEFFEL & COMPANY.