TY  - BOOK
AU  - Webb,John W.
AU  - Reis,Ronald A.
TI  - Programmable logic controllers: principles and applications 
SN  - 9788120323087
PY  - 2003///
CY  - Upper Saddle River, NJ
PB  - Prentice Hall
KW  - Programmable controllers
N1  - Includes bibliographical references and index
ER  -