Programmable controllers : hardware, software, and applications / George L. Batten, Jr. Batten, George L. Programmable controllers. TJ223.P76 B38 1988 629.895 19 BAP Includes index. Bibliography: p. 285-288. Blue Ridge Summit, PA : TAB Professional Reference Books, c1988. c1988. 1988 Text ix, 293 p. : eng