↑ Joseph P. Coker, dwelling #171, family #177, Headrick township, in Jackson, Oklahoma, United States. 1910 U.S. Census Population Schedule. (Washington D.C.: National Archives and Records Administration Publication T624) NARA T624, roll 1255, SD5, ED141, p. 10B (penned), 02 Oct 2008.
Per 1910 census, second marriage for Joseph P. Coker; married 3 years. / digital image from www.ancestry.com