"Michigan, Death Certificates, 1921-1952," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:KF3N-1RJ : accessed 13 July 2015), Mary Jean Kole, 22 May 1940; citing Wyoming, Kent, Michigan, United States, Division for Vital Records and Health Statistics, Lansing; FHL microfilm 1,972,813.