TY  - BOOK
AU  - Ullman,Jeffrey D.
AU  - Widom,Jennifer
TI  - A first course in database systems
SN  - 0138613370
U1  - 005.74 
PY  - 1997///
CY  - New Delhi.
PB  - Pearson
KW  - Database management
N1  - "An Alan R. Apt book."
ER  -