Leach, Donald P. Digital principles and applications / Donald P Leach. - 6th ed / . - New Delhi : Tata McGraw-Hill Publishing , 2006. - xv,683p. : ills.,figs.,tables ; 22cm . Includes index ISBN: 0070601755 RS275.00 Subjects--Index Terms: DIGITAL ELECTRONICS Dewey Class. No.: 621.395 / LEA/D