TY  - BOOK
T1  - An introduction to database systems.
A1  - Date, C. J.
LA  - English
PP  - Reading, Mass.
PB  - Addison-Wesley Pub.
YR  - 1981
ED  - 3d ed.
UL  - https://ds.mainlib.upd.edu.ph/Record/UP-99796217606087498
CN  - QA 76.9 D3 D37
KW  - Data base management.
ER  -