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ETSI TS 122 090
M00003265
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ETSI TS 122 090 Digital cellular telecommunications system (Phase 2+); Universal Mobile Telecommunications System (UMTS); Unstructured Supplementary Service Data (USSD); Stage 1 (3GPP TS 22.090 version 13.0.0 Release 13)
standard by European Telecommunications Standards Institute, 01/01/2016
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