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Different tasks of a census worker, published in Scientific American

http://ei.cs.vt.edu/~history/50th/September.html

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current16:01, 5 March 2008Thumbnail for version as of 16:01, 5 March 2008466 × 684 (27 KB)Trh249 (Talk | contribs)Different tasks of a census worker, published in Scientific American http://ei.cs.vt.edu/~history/50th/September.html
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