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Roberts Motor Company Aircraft Engines | Old Machine Press
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Biography On Andrew Jackson Beard California - writenetwork
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PPT - Black Inventors PowerPoint Presentation, free download - ID:2615169
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Rotary Steam Engines: Page 6.
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Blackfacts.com - On this day Andrew J. Beard, and African American
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J. E. H. Andrew & Co. - 1902 Article-J. E. H. Andrew & Co., Bisschop
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Doyle Rotary Engine
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Andrew J. Beard, Farmer, and Inventor born - African American Registry
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Kurt Robertson explains how a Rotary engine works | Rotary, Engineering