000 00414nam a2200145 4500
020 _a9788131725436
082 _a621.382
_bCOU
100 _aCouch, L.eon W
245 _aDigital and analog communication systems
_cLeon W.Couch
250 _a7th ed.
260 _aNew Delhi
_bPerson Education
_c2010
300 _axi,749p.; 24cm.
650 _aDigital communication systems
650 _aAnalog communication systems
999 _c81944
_d81944