TY  - BOOK
AU  - Bolton, W 
TI  - Programmable logic controllers 
SN  - 978-81-312-1521-0 
U1  - 629.89 BOL  
PY  - 2008///
CY  - Elsevier Academic press 
PB  - New Delhi 
KW  - DIGITAL DESIGN/LOGIC DESIGN
ER  -