"Illinois, Cook County Deaths, 1878-1994," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:QV9V-67L7 : 16 March 2018), Marie Hemmersbach in entry for William John Brophy, 05 Feb 1981; citing Chicago, Cook, Illinois, United States, source reference , record number , Cook County Courthouse, Chicago; FHL microfilm .