TY  - BOOK
TI  - Introduction to programmable logic controllers : : type of communication-english   
T2  - Bergwall Production-series 2   
SN  - 2004000091   
PY  - 0000///
CY  - Crowborough
PB  - Audio Visual Source, 
KW  - Programmable controllers
KW  - Type of communication
N1  - VHS/NTSC
ER  -