File:PSM V33 D667 Calculating instruments for use by the blind.jpg
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 04:06, 22 April 2015 | 1,124 × 1,422 (458 KB) | Ineuw | Cleaned image and improved contrast | |
01:52, 30 September 2010 | 1,147 × 1,442 (493 KB) | Ineuw | {{Information |Description = Calculating instruments for use by the blind |Source = http://en.wikisource.org/wiki/Page:Popular_Science_Monthly_Volume_33.djvu/667 |Date = 1887-1888 |Author = Unknown |Permission = {{PD-old}} |other_versions = }} [[C |
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