000 00284nam a2200121Ia 4500
008 160122s9999 xx 000 0 und d
041 _aEnglish
100 _aD Roy Chaudhary
245 _aNetwork and Systems
260 _bDelhi:new age
_c1988
300 _a926p.
650 _aElectronic
999 _c1118
_d1118