http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Guideline, codes for named populated places, primary county divisions, and other locational entities of the United States, Puerto Rico, and the outlying areas
National Institute of Standards and Technology (U.S.)
"Supersedes FIPS PUB 55-2 - 1987 February 3 and 55DC-4 - 1987 January 16."
"Category: data standards and guidelines, subcategory: representations and codes."
Information storage and retrieval systems
Federal information processing standards publication ; 55-3