"Illinois. County Court (Cook County)" . . . . "Cook County (Illinois). County Clerk." . . . . . . . . . "Certificates are arranged alphabetically by first letter of surname for each month within each year. Some county certificates are filed with city certificates. Many certificates are missing or filed out of sequence."@en . "Cook County, Illinois death certificates, 1878-1909, 1916-1922"@en . "United States, Illinois, Cook" . . "United States, Illinois, Cook, Chicago" . .