Image: Elmer Ambrose Sperry2
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Description: Elmer Ambrose Sperry
Title: Elmer Ambrose Sperry2
Credit: Popular Science Magazine, jun. 1920:https://books.google.com/books?id=xCkDAAAAMBAJ&lpg=PP1&hl=ru&pg=PA50#v=onepage&q=&f=false
Author: Unknown authorUnknown author
Usage Terms: Public domain
License: Public domain
Attribution Required?: No
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