TY  - BOOK
AU  - Ullman,Jeffrey D.
TI  - Principles of database systems
U1  - 510.78 ULL  
PY  - 1992///.
CY  - New Delhi : 
PB  - Galgotia Publications Pvt. Ltd., 
KW  - Computer science
KW  - Database systems
N1  - Includes bibliography and index.
ER  -