| Sources |
- [S2446] West Virginia. Wood County. West Virginia Division of Culture and History, Wood Co., WV Birth Register, (http://www.wvculture.org/vrr/ :n.d.), 1892, 349, line 77, Percy O. McCardle, accessed 19 Sep 2025. (Reliability: 3).
- [S1790] Social Security Administration, Social Security Applications and Claims Index, 1936-2007, (Ancestry.com (http://www.ancestry.com : 2015)), entry for Percy Otas McCardell, 1958, SS no. 189-28-8779, accessed 21 Sep 2025 (Reliability: 3).
lists date of birth as 16 Jun 1891.
- [S1590] WWI Draft Registration Cards, (Ancestry.com. http://www.ancestry.com : 2005.), (http://www.ancestry.com : accessed 21 Sep 2025), card for Percy O. McCardell, serial no. 61A; Precinct 2, Ward 1, Erie, Pennsylvania. (Reliability: 3).
- [S1790] Social Security Administration, Social Security Applications and Claims Index, 1936-2007, (Ancestry.com (http://www.ancestry.com : 2015)), entry for Percy Otas McCardell, 1958, SS no. 189-28-8779, accessed 21 Sep 2025 (Reliability: 3).
- [S2073] West Virginia. Wood County., Wood Co., WV Marriage Register, (Digital images. West Virginia Division of Culture and History, West Virginia Vital Research Records. http://www.wvculture.org/vrr/ : 2020.), marriage register p. 30, line 129, McCardell-Fought, 1866; accessed 19 Sep 2025. (Reliability: 3).
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