. . "United States" . . . . . . . . . . . . . . "Map Guide to the U.S. Federal Censuses, 1790-1920"@en . . . "Shows U.S. country boundary maps for the census decades superimposed on modern county boundaries."@en . . . "Shows U.S. county boundary maps for the census decades superimposed on modern county boundaries. Gives background information on each census, including census availability for each county." . "Shows U.S. county boundary maps for the census decades superimposed on modern county boundaries. Gives background information on each census, including census availability for each county."@en . "Maps"@en . "Maps" . . . . . . . . . "Map guide to the U.S. federal censuses : 1790-1920" . . . . . . . . . "Map guide to the U.S. federal censuses, 1790-1920"@en . "Map guide to the U.S. federal censuses, 1790-1920" . . . . "Estados Unidos" . . "États-Unis" . .