"United States Census, 1930," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/XQBV-J24 : accessed 27 Feb 2014), Henry Sprik in household of Harry Sprik, Grand Rapids, Kent, Michigan, United States; citing enumeration district (ED) 0063, sheet , family 24, NARA microfilm publication .