Electroacoustics - Instruments for measurement of aircraft noise - Performance requirements for systems to measure one-third-octave band sound pressure levels in noise certification of transport-category aeroplanes (IEC 61265:1995); German version EN 61265:1995— 10 стр.
Disk record reproducing equipment; directives for measurements, markings and audio frequency connections, dimensions of interchangeable pickups, requirements of play back amplifiers— 4 стр.
German construction contract procedures (VOB) - Part C: General technical specifications in construction contracts (ATV) - Management of road safety measures at road works— 16 стр.