000 00321nam a2200121Ia 4500
008 220601s2007 xx 000 0 eng d
100 _aSCHWEBER,WILLIAM
245 0 _aELECTRONIC COMMUNICATION SYSTEMS
250 _a4th Ed.
260 _c2007
_aNew Delhi
_bPHI LEARNING Private Limited
300 _a820
942 _2ddc
_cBTECH
999 _c1397
_d1397