00329nam a2200121   4500020001800000100001800018245005800036250001200094260004100106300001200147650003000159700001800189  a9789694073637  aHasnain, S.K.  aDigital Signal Processing: theory and worked examples  a2nd ed.  aKarachi:bRoyal Book Company,c2009.  a129p. ;  aDigital Signal Processing  aPervez Akhtar