DIN IEC 60368-2-1:1993-07 Piezoelectric filters; part 2: guide to the use of piezoelectric filters; section 1: quartz crystal filters; identical with IEC 60368-2-1:1988
1993DIN IEC 60368-2-1:1993-07 Piezoelectric filters; part 2: guide to the use of piezoelectric filters; section 1: quartz crystal filters; identical with IEC 60368-2-1:1988
1993DIN IEC 60368-2-1:1993 Piezoelectric filters; part 2: guide to the use of piezoelectric filters; section 1: quartz crystal filters; identical with IEC 60368-2-1:1988