001: 75438
003: Starlibrary PMS 4.5
005: 20180420
020: ^a0-13-142492-0
066: ^aLe.d
072: ^acommunication systems
082: ^a621.380422
100: ^aLeon W. Couch
240: ^adigital analog communication systems
245: ^adigital analog communication systems
260: ^c2007
650: ^a digital analog