Methods of measuring the characteristics of reproducing equipment for digital audio compact discs (IEC 61096:1992); German version EN 61096:1993— 11 стр.
Digital audio tape recorder reel to reel system, using 6,3 mm magnetic tape, for professional use; part 1: general requirements (IEC 61120-1:1991); German version EN 61120-1:1993— 9 стр.