↑ "Michigan Marriages, 1868-1925," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:NQ79-JXG : 18 February 2021), John Gucwa and Sophia Trzynr Szydlik, 17 Nov 1924; citing Marriage, Detroit, Wayne, Michigan, , Citing Secretary of State, Department of Vital Records, Lansing; FHL microfilm 4001631.
↑ "United States Census, 1930," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:X7MX-MGY : accessed 5 September 2021), Sophia Jucwa in household of John Jucwa, Wells, Tuscola, Michigan, United States; citing enumeration district (ED) ED 38, sheet 5B, line 71, family 96, NARA microfilm publication T626 (Washington D.C.: National Archives and Records Administration, 2002), roll 1027; FHL microfilm 2,340,762.
↑ "California Death Index, 1940-1997," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:VPS1-9NP : 26 November 2014), Trzyna in entry for Valeria Sydlik Hanifin, 31 Oct 1995; Department of Public Health Services, Sacramento.
"Indiana Marriages, 1811-2019," database with images, FamilySearch (https://www.familysearch.org/ark:/61903/1:1:K3LF-HDT : 8 April 2021), Sophia Tryna in entry for Edgar W Bening and Julia Sydlick, 29 Oct 1938; citing Steuben, Indiana, United States, Marriage License, Indiana Commission on Public Records, Indianapolis; FHL microfilm 005329147.
"California, County Marriages, 1850-1952," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:K8KJ-M8V : 9 March 2021), Sophia Tryna in entry for Jack Lyle Hanifin and Valeria Opp, 05 Aug 1947; citing Los Angeles, California, United States, county courthouses, California; FHL microfilm 2,115,960.
"Michigan Obituaries, 1820-2006," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:QL33-JHGY : 1 April 2020), Sophie Gucwa, 19 Nov 1970; citing , Obituary, Grand Rapids Public Library, Michigan; FHL microfilm 1,358,319.
"Michigan Obituaries, 1820-2006," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:QL33-J19W : 1 April 2020), Sophie in entry for John W Gucwa, 07 Feb 1973; citing , Obituary, Grand Rapids Public Library, Michigan; FHL microfilm 1,358,319.