000 00312nam a2200145Ia 4500
100 _aShrader/Robert L
250 _a3
942 _cBK
654 _aelectronic
245 _aElectronic communication
260 _bMc Graw Hill
_aSingapore
_c1993
082 _a621.38
_bSHR
300 _a713
546 _aENGLISH
999 _c26433
_d26433