000 00289nam a2200133Ia 4500
100 _aBlack/ U.D.
942 _cBK
654 _acommunication
245 _aData communications
260 _bPrentice Hall
_aNew Delhi
_c1995
082 _a5.71
_bPAN
300 _a653
546 _aENGLISH
999 _c31735
_d31735