"United States Census, 1910," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MGQV-D9L : accessed 9 September 2020), Kathryn I Mead in household of John W Mead, Grove, Cameron, Pennsylvania, United States; citing enumeration district (ED) ED 2, sheet 5A, family 83, NARA microfilm publication T624 (Washington D.C.: National Archives and Records Administration, 1982), roll 1325; FHL microfilm 1,375,338.
"United States Census, 1940," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:K31P-VN4 : 27 July 2019), Katherine I O'Brien in household of Joseph M O'Brien, Marlborough Town, Ulster, New York, United States; citing enumeration district (ED) 56-53, sheet 22B, line 73, family 344, Sixteenth Census of the United States, 1940, NARA digital publication T627. Records of the Bureau of the Census, 1790 - 2007, RG 29. Washington, D.C.: National Archives and Records Administration, 2012, roll 2795.