TY  - BOOK
AU  - Hackworth,John R.
AU  - Hackworth,Fredrick D.
TI  - Programmable logic controllers: programming methods and applications 
SN  - 9788177587715
U1  - 629.895 22
PY  - 2004///
CY  - New Delhi,
PB  - Pearson
KW  - Programmable controllers
N1  - Includes bibliographical references and index
ER  -