First published as part of AS B279-1968.Revised and redesignated in part as AS 1863-1976.Jointly revised and redesignated in part as AS/NZS 4528:1998.Previous editions AS/NZS4528:1998, AS/NZS4529:1998 and AS/NZS4530:1998.Revised, amalgamated and redesignated as AS4638-2005. Originated as part of AS B279-1968. Previous editions AS/NZS 4528:1998, AS/NZS 4529:1998 and AS/NZS 4530:1998. Revised, amalgamated and redesignated as AS 4638-2005.