TY  - BOOK
AU  - Webb,J 
AU  -  Reis,R
TI  - Programmable logic controllers principles and applications 5/E
SN  - 81-203-2308-4
U1  - 629.895 
PY  - 2005///
CY  - Vidhyanagar
PB  - PHI Pub, Delhi
ER  -