analog and digital Singh, R. P. creator Sapre, S. D. New Delhi Tata McGraw-Hill Publishing 2007 2nd ed xviii, 584 p. 24 cm. (Pbk) ill. by R.P.Singh and S.D.Sapre Includes bibliographical references and index Communication tools 621.382 9780070634541 ENG-86195 B-360045 DBAD / PUB RP/CL/E;20/90/21-10-09/24-10-09/30-10-09