000 00506nam a2200193Ia 4500
020 _a8120310802
082 _a004.6 HEL
100 _aHELD, GILBERT
245 _aUnderstanding data communications
250 _aFourth
260 _bPrentice Hall of India
_aNew Delhi
_c1994
300 _axvii+435
366 _e25141
500 _aInterfacing and communications (004.6)
650 _a data
650 _a Understanding
650 _acommunications
008 141226s1994 xxu||||| |||| 00| 0 eng d
999 _c25893
_d25893