Audio, video and audiovisual systems - Interconnections and matching values - Preferred matching values of analogue signals (IEC 61938:1996); German version EN 61938:1997— 21 стр.
Industrial-process measurement and control - Evaluation of system properties for the purpose of system assessment - Part 4: Assessment of system performance (IEC 61069-4:1997); German version EN 61069-4:1997— 35 стр.
