000 00370nam a2200121Ia 45e0
008 180816s2018 xx 000 0 und d
082 _a004.61
100 _aAgarwal, D. C.
245 0 _aComputer Communication And Isdn Systems
260 _bKHANNA BOOK PUB. DELHI
942 _2ddc
_cREF
999 _c1177
_d1177