File:Hollerith.SA.GIF
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Different activities of census clerks, published by Scientific American
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 11:55, 5 March 2008 | 466 × 684 (27 KB) | Trh249 (Talk | contribs) | Different activities of census clerks, published by Scientific American http://ei.cs.vt.edu/~history/50th/September.html |
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