Lamp caps and holders together with gauges for the control of interchangeability and safety -- Part 2: Lampholders (IEC 60061-2:1969 + Ergänzungen A:1970 bis S:1997 + A18:1998 bis A54:2018, modifiziert) (english version)
Lamp caps and holders together with gauges for the control of interchangeability and safety -- Part 4: Guidelines and general information (IEC 60061-4:1990+ Ergänzungen A:1992, B:1994, C:1994, D:1995 + A5:1998 bis A16:2018, modifiziert) (english version)
Lamp caps and holders together with gauges for the control of interchangeability and safety -- Part 3: Gauges (IEC 60061-3:1969 + Ergänzungen A:1970 bis U:1997 + A20:1998 bis A55:2018, modified) (english version)
Lamp caps and holders together with gauges for the control of interchangeability and safety -- Part 1: Lamps Caps (IEC 60061-1:1969 + Ergänzungen A:1970 to V:1997 + A21:1998 bis A58:2018, modified) (english version)
