TY  - BOOK
AU  - Ullman J.U.
TI  - Principles of Data Base Systems
SN  - 0000022103
U1  - 1.6 
PY  - 1992///
CY  - New Delhi
PB  - Galgotia Publication
KW  -  Data
KW  -  Principles
KW  -  Systems
KW  - Base
KW  - Data Base Mana System
ER  -