TY  - BOOK
AU  - Hackworth,John R.
AU  - Hackworth,Frederick D.
TI  - Programmable logic controllers: programming methods and applications 
SN  - 0130607185
U1  - 629.89 21
PY  - 2004/// [reprinted 2005]
CY  - Upper Saddle River, N.J.
PB  - Merrill
KW  - Programmable controllers
N1  - Includes bibliographical references (p. 281) and index
ER  -