Revised
IEC 60050-131:1978/AMD1:1984 ED1
IEC 60050-131:1978 ED1
Current
IEC 60050-131:2002 ED2
IEC 60050-131:2002/AMD1:2008 ED2
IEC 60050-131:2002/AMD2:2013 ED2
IEC 60050-131:2002/AMD4:2021 ED2
IEC 60050-131:2002/AMD3:2019 ED2
IEC 60050-131:2002/AMD5:2021 ED2