TY  - GEN
AU  - Date , C.J.
TI  -  An introduction to database systems vol; 1
SN  - 0201528789
U1  - 004.74 
PY  - 1990///
CY  - New York
PB  - Wesiey
KW  - COMPUTER SCIENCE
KW  - DATA BASE MANAGEMENT
KW  - DATABASE DESIGN
ER  -