"United States Census, 1850," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/MF8V-43C : accessed 06 May 2014), Richard Acker, Iosco, Livingston, Michigan, United States; citing family 2351, NARA microfilm publication M432.
"1840 United States Federal Census," Online publication - Provo, UT, USA: Ancestry.com Operations, Inc., 2010. Images reproduced by FamilySearch.Original data - Sixth Census of the United States, 1840. (NARA microfilm publication M704, 580 rolls). Records of the Bureau of the Census, Record G