"Illinois, Cook County, Birth Certificates, 1871-1949," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:QL99-RVR2 : 27 March 2017), Betty Joyce Decker, 20 Aug 1934; Chicago, Cook, Illinois, United States, reference/certificate 29706, Cook County Clerk, Cook County Courthouse, Chicago; FHL microfilm .
"United States Social Security Death Index," database, FamilySearch (https://www.familysearch.org/ark:/61903/1:1:JRKQ-HJD : 4 December 2020), Betty J Wiese, 08 Jul 1997; citing U.S. Social Security Administration, Death Master File, database (Alexandria, Virginia: National Technical Information Service, ongoing).