↑ "California Birth Index, 1905-1995," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:VLDT-H43 : 27 November 2014), William F Brock, 09 Jul 1908; citing San Francisco, California, United States, Department of Health Services, Vital Statistics Department, Sacramento.
↑ "United States Census, 1930," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:XCDD-GYZ : accessed 7 November 2017), William F Brock in household of Michael J Brock, Grass Valley, Nevada, California, United States; citing enumeration district (ED) ED 4, sheet 14A, line 24, family 419, NARA microfilm publication T626 (Washington D.C.: National Archives and Records Administration, 2002), roll 178; FHL microfilm 2,339,913.
↑ "California Death Index, 1940-1997," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:VGTR-VTR : 26 November 2014), William Francis Brock, 15 Jan 1993; Department of Public Health Services, Sacramento.