Connectors for frequencies below 3 MHz for use with printed boards - Part 6: Edge-socket connectors and printed-board connectors with 2,54 mm (0,1 in) contact spacing for single or double-sided printed boards of 1,6 mm (0,063 in) nominal thickness (IEC 60603-6:1987); German version EN 60603-6:1998
Edition 1998-04

Methods of measurement for equipment used in digital microwave radio transmission systems; part 1: measurements common to terrestrial radio-relay systems and satellite earth stations; section one: general (IEC 60835-1-1:1990); German version EN 60835-1-1:1992
Edition 1993-09

Measurement of noise emitted by machines; Airborne noise measurement, enveloping surface method; Electrical switchgear and control gear
Edition 1978-03