TY  - BOOK
AU  - Ullman,Jeffrey D. 
TI  - Principles of Data base system 
U1  - 001.6442 
PY  - 1999///
CY  - New Delhi: 
PB  - Galgotia Publication , 
KW  - Computer Science
KW  - DBTG Proposal
KW  - Hashed Files
KW  - Hierarchical Model
ER  -