Kumar, I. Ravi Signals and systems / I. Ravi Kumar. - New Delhi: PHI Learning, 2009. - xv, 563 p.: ill. ; 28 cm. State Grant 2016-2017 Includes bibliographical referrences and index. ISBN: 9788120338517 Subjects--Topical Terms: DIGITAL SIGNALSSIGNALS Dewey Class. No.: 621.3822 / KUM/S