00334nam a2200109Ia 4500008004100000082001900041100002100060245004000081260003900121300001000160650005400170211119s9999||||xx |||||||||||||| ||und||  a621.395bDON-D  aDonald P Leach,  0aDigital Principles and Applications  bTata Macgraw-HillaNew Delhic1900  axix+6  aTechnologyvApplied physicsPhysicsxGeneral Stack