TY  - BOOK
AU  - Ullman,Jeffrey D.
TI  - Principles of database and knowledge-base systems
SN  - 0716781581
PY  - 1988///
CY  - New York, N.Y.
PB  - Computer Science Press
KW  - Computer science
KW  - Database management
KW  - Expert systems (Computer science)
ER  -