TY  - BOOK
AU  - Parr,E.A.
TI  - Programmable controllers: an engineer's guide 
SN  - 0750604980
PY  - 1993///
CY  - Oxford, Boston
PB  - Newnes
KW  - Programmable controllers
KW  - Automatic control
KW  - Computer programs
KW  - Process control
N1  - Includes index
ER  -