01057cam a2200265 i 4500 546084436 TxAuBib 20130214120000.0 000000s2006||||||||||||||||||||||||und|u TxAuBib rda Dorn, Shirley. 1920 U.S. Federal Census for Cook County, State of Illinois : Extraction of Selected Suburbs / by Shirley Dorn. Ill., 2006. 75 p. ; 23 cm. txt rdacontent n rdamedia nc rdacarrier 20130214. Census districts -- Illinois -- Calumet (Cook County : Township.) Census districts -- Illinois -- Provisio (Cook County : Township.) Census districts -- Illinois -- River Forest (Cook County : Township.) Census districts -- Illinois -- Thornton (Cook County : Township.) Dorn, George.