"United States Census, 1810," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:XH2B-XGB : accessed 6 March 2017), Wm Cowen, Morris, Greene, Pennsylvania, United States; citing p. 11, NARA microfilm publication M252 (Washington D.C.: National Archives and Records Administration, n.d.), roll 49; FHL microfilm 193,675.
"United States Census, 1830," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:XH5S-713 : 18 August 2015), William Cowen, Morris, Greene, Pennsylvania, United States; citing 414, NARA microfilm publication M19, (Washington D.C.: National Archives and Records Administration, n.d.), roll 162; FHL microfilm 20,636.
"United States Census, 1840," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:XHTY-LPV : 24 August 2015), William Cowen, Washington Township, Greene, Pennsylvania, United States; citing p. 39, NARA microfilm publication M704, (Washington D.C.: National Archives and Records Administration, n.d.), roll 461; FHL microfilm 20,546.
"United States Census, 1850," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:M4HV-W8R : 9 November 2014), William Cowen, Washington, Greene, Pennsylvania, United States; citing family 100, NARA microfilm publication M432 (Washington, D.C.: National Archives and Records Administration, n.d.).
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