DIN 57535-1 ; DIN VDE 0535-1:1979-12 ; VDE 0535-1:1979-12 [Withdrawn] references following documents:
| Document number | Edition | Title |
|---|---|---|
| IEC 60050-531 | 1974 | International Electrotechnical Vocabulary. Part 531 : Electronic tubes More |
| IEC 60050-55 | 1970 | International Electrotechnical Vocabulary. Part 55 : Telegraphy and telephony More |
| IEC 60050-691 | 1973 | International Electrotechnical Vocabulary - Part 691: Tariffs for electricity More |