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Census of 1840, Northumberland County, Pa
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The Black, Mulatto, and Allied Families of Centre County, Pennsylvania : For use in Family Research
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Township index for Mifflin County : 1860 census
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1850 Antis Township census, Blair County, PA
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Agricultural schedules and federal census schedules, 1850-1880 : Brecknock Township, Lancaster County, Pennsylvania
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Tracing your ancestors using the census : a guide for family historians
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The sum of the people : how the census has shaped nations, from the ancient world to the modern age
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The sum of the people how the census has shaped nations, from the ancient world to the modern age
