TY  - BOOK
AU  - Gray Peter M D
TI  - Logic algebra and databases
T2  - Ellis horwood series in computers and their applications
U1  - D65,8(B):3:(X:8), M4 
PY  - 1984///
CY  - New York    
PB  -  John Wiley       
KW  -  Database
KW  - Computer science
ER  -