TY  - BOOK
AU  - Bolton,W
TI  - Programmable logic controllers : introduction
SN  - 0-7506-5986-6
U1  - 004.16 
PY  - 2003///
CY  - Amsterdam
PB  - Elsevier
KW  - Computer science
KW  - Debugging
KW  - Internal relays
KW  - Shift registers
N1  - Includes index; Asian book
ER  -