"United States Census, 1900," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/MSNV-V4G : accessed 04 Jun 2014), Beatrice Spoolstra in household of Bogert Spoolstra, Borough of Brooklyn, Election District 11 New York City Ward 27, Kings, New York, United States; citing sheet 16B, family 357, NARA microfilm publication T623, FHL microfilm 1241065.