Quartz crystal controlled oscillators of assessed quality - Part 4-1: Blank detail specification; capability approval (IEC 60679-4-1:1998); German version EN 60679-4-1:1998— 8 стр.
Quartz crystal controlled oscillators of assessed quality - Part 1: Generic specification (IEC 60679-1:1997 + A1:2002); German version EN 60679-1:1998 + A1:2002— 80 стр.