"Kentucky, County Marriages, 1797-1954," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:Q2Q6-H674 : 22 July 2021), Conrad Roth and Emma Burggraf, 8 May 1900; citing Marriage, , Mason, Kentucky, United States, various county clerks and county courts, Kentucky; FHL microfilm 1,534,060.
"Ohio Death Index, 1908-1932, 1938-1944, and 1958-2007", database, FamilySearch (https://www.familysearch.org/ark:/61903/1:1:VKGJ-79X : 30 June 2021), Burgraf and Roth in entry for Katherine Elizabeth Hayes, 1992.