00377nam a22001457a 4500020001700000082002100017100002100038245004000059250001200099260003100111300000900142650003500151700002700186700001800213  a978939203405  a621.38153bLEA-D  aLeach , Donald P  aDigital principles and applications  a8th Ed.  aNew Delhi McGraw-Hill 2015  a705p  aPhysics aDigital electronics   aMalvino , Albert Paul   aSaha , Goutam