TY  - BOOK
AU  - Parr,E.A.
TI  - Programmable controllers: an engineer's guide 
SN  - 0-7506-5757-X
AV  - TJ223.P76 P37 2003
PY  - 2003///
CY  - Oxford
PB  - Newnes
KW  - Controladores programables
ER  -