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Creation date / 2021 / March / 18
- Pennsylvania Water Power Company History. 2.
- THE JAMES LEFFEL & COMPANY HISTORY PROJECT.
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- Estacada, Oregon Hydro Power.
- Development of the Great Falls Power Company.
- Pennsylvania Water Power Company History. 1.
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- A Vintage machine shop manufacturing history project.
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- The James River, Va Water-Power Development. 2.
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- Electricity in Northwest Washington. 1.
- Early Lombard Governor System. Page 2.
- A vintage governor advertisement project.