TY  - BOOK
AU  - Parr,E.Andrew
TI  - Programmable controllers: an engineer's guide 
SN  - 0750639350
AV  - TJ223.P76  .P37 1999
PY  - 1999/// (Rep. 2001)]
CY  - Oxford
PB  - Newnes
KW  - Programmable controllers
ER  -