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| | What is the IPUMS? (Site not responding. Last check: 2007-10-31) |
 | | The Integrated Public Use Microdata Series consists of a series of compatible-format individual-level representative samples of the United States for the years 1850, 1860, 1870, 1880, 1900, 1910, 1920, 1940, 1950, 1960, 1970, 1980, 1990, and 2000. |
 | | The 1850 and 1860 samples exclude the slave population. |
 | | 1850: Steven Ruggles, Russell R. Menard, et al., Public Use Microdata Sample of the 1850 United States Census of Population: User's Guide and Technical Documentation, Social History Research Laboratory, Department of History, University of Minnesota, 1995. |
| www.ipums.umn.edu /usa/intro.html (5616 words) |
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