Webb, John W. Programmable logic controllers : principles and applications / John W. Webb, Ronald A. Reis. - 5th ed. - Upper Saddle River, NJ : Prentice Hall, 2003. - xv, 460 p. : ill. ; 25 cm. Includes bibliographical references and index. ISBN: 013041672X Subjects--Topical Terms: Computerized Process Control. Dewey Class. No.: 629.89 / WEP 2003