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- [S70] Online Records, Cemetery, Find A Grave, (http://www.findAgrave.com).
- [S620] 1900 Census Texas, Callahan Co., Texas, Callahan Co., (www.ancestry.com: National Archives and Records Administration, n.d.), T623, Precinct 5, enumeration district (ED) 16, sheet 3A, p. 5, dwelling 38, family 39, W R Cook, accessed 25 May 2011 (Reliability: 4), 25 May 2011.
- [S612] 1910 Census Texas, Callahan Co., Texas, Callahan Co., (www.ancestry.com: National Archives and Records Administration, n.d.), T624, Precinct 5, enumeration district (ED) 15, sheet 3A, p. 5, dwelling 46, family 46, William R Cook, accessed 25 May 2011 (Reliability: 4), 25 May 2011.
- [S625] 1920 Census Texas, Taylor Co., Texas, Taylor Co., (www.ancestry.com: National Archives and Records Administration, n.d.), T625, Precinct 1, enumeration district (ED) 257, sheet 1B, p. 2, dwelling 12, family 13, W R Cook, accessed 26 May 2011 (Reliability: 4), 26 May 2011.
- [S614] 1930 Census Texas, Callahan Co., Texas, Callahan Co., (www.ancestry.com: National Archives and Records Administration, n.d.), T626, Clyde, enumeration district (ED) 30-6, sheet 7A, p. 13, dwelling 159, family 168, W Roll Cook, accessed 26 May 2011 (Reliability: 4), 26 May 2011.
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