"United States Census, 1920," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/MF9R-1BK : accessed 28 Nov 2014), Ynte Vanderbrok in household of Richard Vanderbrok, Uxbridge, Worcester, Massachusetts, United States; citing sheet 27B, family 606, NARA microfilm publication T625, National Archives and Records Administration, Washington D.C.; FHL microfilm 1820748.