TY  - BOOK
AU  - Bolton, W.
TI  - Programmable logic controllers : an introduction
SN  - 0750659866
U1  - 621.381952 
PY  - 2003///
CY  - New Delhi
PB  - Elsevier
KW  - Programmable  controllers
KW  - Sequence controller,programmable
ER  -