TY  - BOOK
AU  - Crispin,Alan J.
TI  - Programmable logic controllers and their engineering applications
SN  - 0077072278
U1  - 629.895 22
PY  - 1990///].
CY  - London: 
PB  - McGraw-Hill, 
KW  - Programmable controllers
N1  - Includes bibliographical references and index
ER  -