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Censimento Americano, Schede Perforate e Macchina di Analisi (25 März 1880 Jahr – 25 März 1887 Jahr)

Beschreibung:

Hollerith inventò una macchina di analisi a schede perforate per un censimento in America (iniziato nel 1880)

Zugefügt zum Band der Zeit:

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ByFrancesca Previtali

20 Nov 2017

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Datum:

25 März 1880 Jahr

25 März 1887 Jahr

~ 7 years

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