TY  - BOOK
AU  - ULLMAN JEFFREY D
TI  - PRINCIPLES OF DATABASE SYSTEMS
SN  - 6632
U1  - 5.74 
PY  - 1992///
CY  - NEW DELHI
PB  - GALGOTIA PUBLISHER (G.P)
KW  - ENGINEERING ; SANITARY ; SUPPLY ; WATER
ER  -