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Author
Louisiana State University (Baton Rouge, La.). Department of Geography and Anthropology.
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Subject
Boundaries
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Place
California
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Place
United States
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Place
Connecticut
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Data type
Polygon
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Year
1920
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1. Historical United States County Boundaries, 1920
1920. 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 1920. Attributes include county and state names as well as FIPS identifi... Geoscience Publications.