Ancestry.com, Selected U.S. Federal Census Non-Population Schedules, 1850-1880, database on-line, Provo, UT, Ancestry.com Operations, Inc., 2010.

Hardin, Nathan G.: Year: 1840; Census Place: Winfield, Herkimer, New York; Roll: 290; Page: 158; Image: 328; Family History Library Film: 0017190.