地名情報システム
Report: "Countries, Dependencies, Areas Of Special Sovereignty, And Their Principal Administrative Divisions," Federal Information Processing Standards, FIPS 10-4. Standard was withdrawn in September 2008, See Federal Register Notice: Vol. 73, No. 170, page 51276 (September 2, 2008)
Report: "Principles, Policies, and Procedures: Domestic Geographic Names," U.S. Board on Geographic Names, 1997.
U.S. Postal Service Publication 28, November 2000.