File:PSM V32 D389 Sun spot curves and lake erie water level 1769 1838.jpg
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 05:09, 27 September 2010 | 2,186 × 1,239 (380 KB) | Ineuw | {{Information |Description = Sun spot curves and Lake Erie water level 1769-1838 |Source = http://en.wikisource.org/wiki/Page:Popular_Science_Monthly_Volume_32.djvu/389 |Date = 1887-1888 |Author = Unknown |Permission = {{PD-old}} |other_versions = } |
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