00270nam a2200121Ia 4500100002000000250000600020654001200026245004400038260002800082082001800110300000800128546001200136  aWakerly/John F   a3  adigital  aDigital design:Principles and practices  bPearson Educationc2001  a621.3815bWAK  a972  aENGLISH