"United States Census, 1880," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/MW3H-MTQ : accessed 20 Apr 2014), Jan M Hoekstra, Holland, Ottawa, Michigan, United States; citing sheet 517D, NARA microfilm publication T9.
"United States Census, 1870," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/MHCD-FKV : accessed 20 Apr 2014), Jan Hoekstra, Michigan, United States; citing p. 22, family 174, NARA microfilm publication M593, FHL microfilm 000552196.