TY  - BOOK
AU  - Webb John W.
AU  - Reis Ronald
TI  - Programmable logic controllers: Principles and applications
SN  - 9788120323087
U1  - 629.89 
PY  - 2013///
CY  - Delhi
PB  - PHI Learning, 
N1  - “It Includes bibliographical references (p.441-455) and index”
ER  -