Ancestry.com - Arkansas Census, 1819-70
AIS indexes. Original source: Jackson, Ron V., Accelerated Indexing Systems, comp.. Arkansas Census, 1819-70 [database on-line]. Provo, UT, USA: The Generations Network, Inc., 1999. Original data: Compiled and digitized by Mr. Jackson and AIS from microfilmed schedules of the U.S. Federal Decennial Census, territorial/state censuses, and/or census substitutes.