Online publication - Jackson, Ron V., Accelerated Indexing Systems, comp.. Maryland Census, 1772-1890 [database on-line]. Provo, UT, USA: MyFamily.com, 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.