00338pam a2200121 a 4500020002500000041000500025082001500030100003800045245008700083250001200170260002600182300000800208  a978-0-07-0143170-4c  h  a621.381'14  aLeach D.P. & Malvine A.P.eAuthor  aDigital Principles and ApplicationscLeach D.P. & Malvine A.P.hTextual Documents   a1st Ed.  bTat McGraw Hillc2012  a682