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ITU-T E Suppl. 3 (12/1972)

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Special service observation data
Approval date: 1972-12-15
Approval process:WTSA
Status: Superseded
Maintenance responsibility:
Further details: Patent statement(s)
Ed. ITU-T Recommendation Status Summary Table of Contents Download
1 E Suppl. 3 (12/1972) Superseded - - Not available