"United States Census, 1900," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MSW7-Q9R : accessed 14 January 2021), Mary K Acks in household of George Acks, Dahlgren Township Dahlgren village, Hamilton, Illinois, United States; citing enumeration district (ED) 50, sheet 8A, family 148, NARA microfilm publication T623 (Washington, D.C.: National Archives and Records Administration, 1972.); FHL microfilm 1,240,304.
"United States Census, 1910," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MKDH-NTK : accessed 13 October 2022), Marnie Keifer in household of William Keifer, Dahlgren, Hamilton, Illinois, United States; citing enumeration district (ED) ED 38, sheet 8B, family 174, NARA microfilm publication T624 (Washington D.C.: National Archives and Records Administration, 1982), roll 291; FHL microfilm 1,374,304.
"United States Census, 1930," database with images, FamilySearch (https://www.familysearch.org/ark:/61903/1:1:XSYC-YLN : accessed 13 October 2022), Mamie K Kiefer in household of William L Kiefer, Dahlgren, Hamilton, Illinois, United States; citing enumeration district (ED) ED 7, sheet 4A, line 38, family 76, NARA microfilm publication T626 (Washington D.C.: National Archives and Records Administration, 2002), roll 514; FHL microfilm 2,340,249.
"Illinois, County Marriages, 1810-1940," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:Q2DM-KKSB : 22 July 2021), Acks in entry for Linus F Kiefer and Anne E Keserauskis, 10 Apr 1934; citing East Saint Louis, St. Clair, Illinois, United States, county offices, Illinois; FHL microfilm 2,195,562.
"United States Census, 1940," database with images, FamilySearch (https://www.familysearch.org/ark:/61903/1:1:KWH7-9BL : 8 January 2021), Mary Keifer in household of William L Keifer, Dahlgren Township, Hamilton, Illinois, United States; citing enumeration district (ED) 33-6, sheet 2A, line 39, family 24, 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 809.
"United States, GenealogyBank Obituaries, Births, and Marriages 1980-2014," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:QKRB-CHGN : accessed 13 October 2022), Mary Kathryn Acks Kiefer in entry for Mr Wendel W Kiefer, Annapolis, Maryland, United States, 17 Mar 2005; from "Recent Newspaper Obituaries (1977 - Today)," database, GenealogyBank.com (http://www.genealogybank.com : 2014); citing Capital, The, born-digital text.
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