TY  - BOOK
AU  - Date, C. J.
TI  - An Introduction to Database Systems 1
SN  - 0201528789
U1  - 005.7 
PY  - 1990///
CY  - Reading, Massachusetts : 
PB  - Addison-Wesley, 
KW  - Database Management
N1  - NN; v. 1.
UR  - https://eaklibrary.neduet.edu.pk:8443/catalog/bk/books/toc/0-201-52878-9.pdf
ER  -