"United States Census, 1920," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MV91-PGB : accessed 10 January 2018), Julia Avery in household of Jacob Avery, Stony Point, Rockland, New York, United States; citing ED 239, sheet 9B, line 69, family 215, NARA microfilm publication T625 (Washington D.C.: National Archives and Records Administration, 1992), roll 1258; FHL microfilm 1,821,258.
"United States Census, 1930," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:X4TJ-F26 : accessed 10 January 2018), Julia Avery in household of Jacob Avery, Stony Point, Rockland, New York, United States; citing enumeration district (ED) ED 42, sheet 7B, line 99, family 191, NARA microfilm publication T626 (Washington D.C.: National Archives and Records Administration, 2002), roll 1641; FHL microfilm 2,341,375.
"United States Census, 1940," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:K31S-WDQ : accessed 10 January 2018), Julia Avery in household of Jacob Avery, Stony Point Town, Rockland, New York, United States; citing enumeration district (ED) 44-62, sheet 13A, line 34, family 248, 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 2768.