^City Clerk's Office, City of Chico, Roster of Chico City Council Members
^ abcd"United States Census, 1870," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/MN66-1GB : accessed 23 Apr 2014), Oliver L Clark, California, United States; citing p. 36, family 382, NARA microfilm publication M593, FHL microfilm 000545569.
^"United States Census, 1850," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/MWZF-NP2 : accessed 24 Apr 2014), William C Clark, Manchester, Hillsborough, New Hampshire, United States; citing family 868, NARA microfilm publication M432.