First published as AS CE1-1960.Revised and redesignated in part as AS 1742.1-1975.AS 1742.2 first published 1978.AS 1742.1-1975 and AS 1742.2-1978 revised, amalgamated and redesignated in part as AS 1742.12-1986.Second edition 2000. First published as AS CE1-1960. Revised and redesignated in part as AS 1742.1-1975. AS 1742.2 first published 1978. AS 1742.1-1975 and AS 1742.2-1978 revised, amalgamated and redesignated in part as AS 1742.12-1986. Second edition 2000.