TY  - BOOK
AU  - Webb, John W
TI  - Programmable logic controllers: Principles And Application
SN  - 9788120323087
U1  - 629.895 W382p5 
PY  - 2005///
CY  - New Delhi 
PB  - Prentice-Hall
KW  - Programmable controllers
KW  - Micro-elektronica
ER  -