TY  - BOOK
AU  - Ullman, Jeffrey D
TI  - Principles of database systems
SN  - 8175155450
CY  - New Delhi
KW  - Database systems
KW  - Databse -- Models
KW  - Distibuted database
KW  - knowledge base systems
KW  - Object oriented database
KW  - Relational database
N1  - Includes bibliographical references and index
ER  -