Census 2000 pl 94 171 techdoc
...andMunicipioinPuertoRico;inMaryland,Missouri, Nevada,andVirginia,oneormorecitiesareinde...geographic areas, such as counties, cities, census tracts, and blocks. State par-
https://www.census.gov/content/dam/Census/programs-surveys/rdo/TechnicalDocumentation/Census2000_pl94-171_techdoc.pdf