INCITS 31-200X http://www.census.gov/geo/reference/ansi.html INCITS 38-200X Standards for Counties and Equivalent Entities - FIPS Codes FIPS Codes Codes FIPS Codes http://www.census.gov/geo/reference/ansi.html FIPS Codes U.S. Census Bureau--FIPS Codes Standards for Counties and Equivalent Entities - FIPS Codes Codes FIPS Codes "American National Standards Institute (ANSI) Codes"