File:PSM V58 D468 Method of star count within a radius.png

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English: Method of star count within a radius
Date between 1900 and 1901
date QS:P,+1900-00-00T00:00:00Z/8,P1319,+1900-00-00T00:00:00Z/9,P1326,+1901-00-00T00:00:00Z/9
Source Popular Science Monthly Volume 58
Author Unknown authorUnknown author

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current16:40, 15 July 2011Thumbnail for version as of 16:40, 15 July 2011917 × 916 (17 KB)Ineuw (talk | contribs)

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