MS27033B, MILITARY STANDARD: LIGHT, MARKER, AIRPORT, SEMIFLUSH, BASE MOUNTED, OMNIDIRECTIONAL (18 DEC 1964) [NO SUPERSEDING DOCUMENT]
MS27033B, MILITARY STANDARD: LIGHT, MARKER, AIRPORT, SEMIFLUSH, BASE MOUNTED, OMNIDIRECTIONAL (18 DEC 1964) [NO SUPERSEDING DOCUMENT].