File:PSM V79 D461 Elliptic involutions around all points of a dry river bed.png

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English: Elliptic involutions around all points of a dry river bed
Date
Source Popular Science Monthly Volume 79
Author Unknown authorUnknown author

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current06:28, 7 June 2012Thumbnail for version as of 06:28, 7 June 20121,610 × 1,063 (203 KB)Ineuw (talk | contribs)

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