000			00385nam a22001337a 4500
999			_c1253 _d1253
082			_a004.66 _bHEL/UND
100			_aHeld,Gilbert. _91492
245			_aUnderstanding Data Communications _cGilbert Held.
250			_a6th ed.
260			_aIndiana : _bNew Riders, _cc1999.
300			_axviii, 619 p.: _b[33]
504			_aThis book is having Bibliography on page no 577.
942			_cBOOK