"United States Census, 1910," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/ML5T-FW9 : accessed 21 Apr 2014), William Geldersma, Grand Rapids Ward 5, Kent, Michigan, United States; citing enumeration district (ED) 73, sheet 10A, family 225, NARA microfilm publication T624, FHL microfilm 1374670.