First published as AS K1.20-1964.Revised and redesignated AS 1050.20-1983.Jointly revised and designated as Joint Standard AS/NZS 1050.20:1994.Reconfirmed 2016. First published as AS K1.20-1964. Revised and redesignated AS 1050.20-1983. Jointly revised and designated as Joint Standard AS/NZS 1050.20:1994.