File:PSM V75 D037 Propeller wheel boomerang.png

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English: Propeller wheel boomerang
Date
Source Popular Science Monthly Volume 75
Author Unknown authorUnknown author

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Public domain
This media file is in the public domain in the United States. This applies to U.S. works where the copyright has expired, often because its first publication occurred prior to January 1, 1929, and if not then due to lack of notice or renewal. See this page for further explanation.
United States
United States
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current00:15, 21 July 2012Thumbnail for version as of 00:15, 21 July 20121,784 × 1,473 (16 KB)Ineuw (talk | contribs)

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