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Cao, Changyong
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Louisiana State University (Baton Rouge, La.). Department of Geography and Anthropology.
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Otterstrom, Samuel
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Connecticut
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Illinois
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1870
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1. Historical United States County Boundaries, 1870
1870. Earle, Carville, Heppen, John, Louisiana State University (Baton Rouge, La.). Department of Geography and Anthropology., Otterstrom, Samuel, and Cao, Changyong. This polygon shapefile contains county boundaries for the United States in 1870. Attributes include county and state names as well as FIPS identifi... Geoscience Publications.