You searched for: Author Cao, Changyong Remove constraint Author: Cao, Changyong Access Restricted Remove constraint Access: Restricted Place Illinois Remove constraint Place: Illinois Year 1800 Remove constraint Year: 1800
1800. 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 1800. Attributes include county and state names as well as FIPS identifi... Geoscience Publications.