TY  - BOOK
AU  - Keravenou,E.T.
AU  - Johnson L.
TI  - Competent expert systems
SN  - 0070341680
U1  - 621.C61 
PY  - 1986///
CY  - New York
PB  - Mcgraw-Hill book
KW  - Expert systems (Computer science)
KW  - Automatic checkout equipment
ER  -