TY  - BOOK
AU  - Hackworth, John R.
AU  - Hackworth, Frederick D.
TI  - Programmable logic controllers: programming methods and applications
SN  - 9788129703408
U1  - 005.115 H118p 
PY  - 2004///
CY  - Delhi
PB  - Pearson Education (Singapore)
KW  - Programmable controllers
ER  -