TY  - BOOK
AU  - Gray,Peter M D.
TI  - Logic, algebra and databases / 
SN  - 8185095825
U1  - 005.131 
PY  - 1984///
CY  - New Delhi : 
PB  - Affiliated East-West Press , 
KW  - ALGEBRAIC LOGIC DATA BASES
N1  - NULL
ER  -