"United States Census, 1920," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MXBB-KRC : accessed 1 October 2017), Household of Arthur Pitre, Lowell Ward 2, Middlesex, Massachusetts, United States; citing ED 185, sheet 4A, line 38, family 68, NARA microfilm publication T625 (Washington D.C.: National Archives and Records Administration, 1992), roll 711; FHL microfilm 1,820,711.
"United States Census, 1930," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:XQPW-WRG : accessed 2 October 2017), Henri Petre, Lowell, Middlesex, Massachusetts, United States; citing enumeration district (ED) ED 112, sheet 7A, line 14, family 83, NARA microfilm publication T626 (Washington D.C.: National Archives and Records Administration, 2002), roll 921; FHL microfilm 2,340,656.
"United States Census, 1940," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:K4VT-WZN : accessed 2 October 2017), Henry Pitre, Ward 5, Lowell, Lowell City, Middlesex, Massachusetts, United States; citing enumeration district (ED) 18-69, sheet 6A, line 37, family 89, 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 1692.
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