Lamp caps and holders together with gauges for the control of interchangeability and safety - Part 1: Lamp caps (IEC 60061-1:1969 + Supplements A:1970 to S:1996, modified); German version EN 60061-1:1993 + A1:1995 + A2:1995 + A3:1995 + A4:1996— 238 стр.
Lamp caps and holders together with gauges for the control of interchangeability and safety - Part 1: Lamp caps (IEC 60061-1:1969 + supplements A:1970 to V:1997 + A21:1998 to A40:2008, modified); German version EN 60061-1:1993 + A1:1995 to A7:1997 + A21:1998 to A40:2008— 351 стр.