"United States Census, 1900," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MMBD-GJ9 : accessed 30 November 2020), William Burchard in household of John M Burchard, Washington Township (east side), Blackford, Indiana, United States; citing enumeration district (ED) 28, sheet 6A, family 107, NARA microfilm publication T623 (Washington, D.C.: National Archives and Records Administration, 1972.); FHL microfilm 1,240,360.
"Indiana Marriages, 1811-2007," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:XXJC-BPX : 10 December 2017), William Burchard and Estella Amelia Crowell, 02 Jun 1906; citing Blackford, Indiana, United States, Marriage Registration, Indiana Commission on Public Records, Indianapolis; FHL microfilm 004201887.