The IPUMS consists of twenty-five high-precision samples of the American population drawn from thirteen federal censuses. Some of these samples have existed for years, and others were created specifically for this database. The twenty-five samples, which span the censuses of 1850 to 1990, collectively comprise our richest source of quantitative information on long-term changes in the American population.
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Technische Bereitstellung
Historical Census Projects - Department of History - University of Minnesota: Minneapolis, US (MN) <http://www.ipums.umn.edu/>
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