Webb, John W. Programmable logic controllers principles and applications - 5th. - New Delhi Prentice-Hall 2003 - xv, 460p. 23cm. ISBN: 9788120323087 Subjects--Topical Terms: PLCMICROCOMPUTERCOMPUTER ENGINEERINGMICOR CONTROLLERSAPPLIED PHYSICS Dewey Class. No.: 621.3916 / WEB