- JAMES LEFFEL & COMPANY AND THE WOODWARD COMPANY HISTORY.
- Circa 1895
- The James Leffel factory picture in their catalog.
- The Samson Turbine Water Wheel history on the world wide web.
- 5
- The James Leffel & Company's factory history.
- JAMES LEFFEL & COMPANY
- 4
- The James Leffel & Company's factory history.
- 3
- 6
- PREFACE
- WATER POWER ENGINEERING HISTORY
- STYLE 24 with a Woodward Standard size 2 governor.
- 165