IEC 60050-714 Amd.4 Ed. 1.0 b:2019

IEC 60050-714 Amd.4 Ed. 1.0 b:2019 Amendment 4 - International Electrotechnical Vocabulary (IEV) - Part 714: Switching and signalling in telecommunications

Amendment by International Electrotechnical Commission, 10/17/2019