"United States Census, 1910," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/MG9X-HXL : accessed 01 May 2014), Sterpe Snock, Rock, Sioux, Iowa, United States; citing enumeration district (ED) 155, sheet 9A, family 184, NARA microfilm publication T624, FHL microfilm 1374436.