Roth, 1917, The Free Balloon

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Charles Harters Roth. A Short Course on The Theory and Operation of the Free Balloon. Second edition. Akron: Goodyear Tire and Rubber Company, 1917.

Online at Internet Archive.

Author thanks Ralph Hazlett Upson, Ralph A. D. Preston, Col. C. De F. Chandler, and Dr. Albert Francis Zahm.


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