"United States Census, 1930," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/X3M1-7R4 : accessed 21 Nov 2014), Rose Dykstra in household of John Dykstra, Union Grove, Whiteside, Illinois, United States; citing enumeration district (ED) 0041, sheet 5A, family 83, NARA microfilm publication T626, National Archives and Records Administration, Washington D.C.; FHL microfilm 2340301.