TY  - BOOK
AU  - Crispin,Alan J.
TI  - Programmable logic controllers and their engineering applications
SN  - 0077093178
AV  - TJ223 .P76  .C74 1997
PY  - 1997///
CY  - London
PB  - McGraw-Hill
KW  - Programmable controllers
ER  -