TY  - BOOK
AU  - Ullman J.D.
TI  - Principles of Data Base Systems
SN  - 0000018057
U1  - 1.6 
PY  - 1991///
CY  - New Delhi
PB  - Galgotia Publication
KW  - Base  Data  Principles  Systems
KW  - Data Base Mana System
ER  -