Location Identifiers, at P 7350.1a (Report). Federal Aviation Agency, U.S. Department of Transportation. 4 June 1963. AC 90-4. Retrieved 14 August 2026. Full text of a slightly revised version of the list.
Location Identifiers, at P 7350.1a (Report). Federal Aviation Agency, U.S. Department of Transportation. 4 June 1963. AC 90-4. Retrieved 14 August 2026. Full text of a slightly revised version of the list.