"United States Census, 1900," database with images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/M97F-2YQ : accessed 22 January 2016), Henretta Armstrong in household of Herbert Armstrong, Norwich township (excl. Norwich city), New London, Connecticut, United States; citing sheet 14B, family 325, NARA microfilm publication T623 (Washington, D.C.: National Archives and Records Administration, n.d.); FHL microfilm 1,240,149.
"Connecticut Births and Christenings, 1649-1906," database, FamilySearch (https://familysearch.org/pal:/MM9.1.1/F7QY-DDD : accessed 22 January 2016), H... Etta Mciva in entry for Percival Tyler Armstrong, 16 Oct 1900; citing Norwich, New London, Connecticut, United States; FHL microfilm 1,311,439.
"United States Census, 1910," database with images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/MK2T-T95 : accessed 22 January 2016), Henrietta M Armstrong in household of Herbert H Armstrong, New London Ward 1, New London, Connecticut, United States; citing enumeration district (ED) ED 513, sheet 19A, NARA microfilm publication T624 (Washington, D.C.: National Archives and Records Administration, n.d.); FHL microfilm 1,374,155.
"California Death Index, 1940-1997," database, FamilySearch (https://familysearch.org/pal:/MM9.1.1/VPN5-MM8 : accessed 22 January 2016), Mcivor in entry for Tyler Percival Armstrong, 13 Nov 1959; Department of Public Health Services, Sacramento.
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