TY  - GEN
AU  - Webb, John W.                
AU  - Reis,Ronald A.
TI  - Programmable Logic Controllers: Principles and Applications 
SN  - 0136794084
U1  - 629.89 22
PY  - 1999///
CY  - Upper Saddle River, N.J.
PB  - Prentice Hall
KW  - Programmable controllers
N1  - Includes bibliography p.435-438 and index
ER  -