001: 68942
003: Starlibrary PMS 4.5
005: 20180420
020: ^a0-07001069-2
066: ^asa.d
072: ^aCommunications and Control
082: ^a621
100: ^asayd riffat
240: ^adigital switching systems
245: ^adigital switching systems
260: ^c1997
650: ^a SWItching System Fundamentals