↑ "United States Census, 1910," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MLRT-CMG : accessed 30 July 2017), Della Petre in household of Tusan Petre, Jonesfield, Saginaw, Michigan, United States; citing enumeration district (ED) ED 42, sheet 8B, family 32, NARA microfilm publication T624 (Washington D.C.: National Archives and Records Administration, 1982), roll 671; FHL microfilm 1,374,684.
↑ "United States Census, 1920," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MZ73-RXT : accessed 12 May 2018), Della Petre in household of Tusan Petre, Jones Field, Saginaw, Michigan, United States; citing ED 165, sheet 4B, line 80, family 83, NARA microfilm publication T625 (Washington D.C.: National Archives and Records Administration, 1992), roll 793; FHL microfilm 1,820,793.
↑ "United States Census, 1930," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:X7MM-6P4 : accessed 12 May 2018), Della Petrie in household of Tusan Petrie, Merrill, Saginaw, Michigan, United States; citing enumeration district (ED) ED 19, sheet 5A, line 6, family 94, NARA microfilm publication T626 (Washington D.C.: National Archives and Records Administration, 2002), roll 1021; FHL microfilm 2,340,756.
↑ "United States Census, 1940," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:K416-B93 : accessed 12 May 2018), Della Kwiatkowski in household of Sigmund Kwiatkowski, Ward 21, Saginaw, Saginaw City, Saginaw, Michigan, United States; citing enumeration district (ED) 73-72B, sheet 9A, line 30, family 160, Sixteenth Census of the United States, 1940, NARA digital publication T627. Records of the Bureau of the Census, 1790 - 2007, RG 29. Washington, D.C.: National Archives and Records Administration, 2012, roll 1814.
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DNA Connections
It may be possible to confirm family relationships with Della by comparing test results with other carriers of her ancestors' mitochondrial DNA.
However, there are no known mtDNA test-takers in her direct maternal line.
It is likely that these autosomal DNA test-takers will share some percentage of DNA with Della: