TY  - BOOK
AU  - Ullman,Jeffrey D.
TI  - Principles of database systems
SN  - 0716780690
U1  - 005.74 
PY  - 1983///] c1982
CY  - Rockville, Md.
PB  - Computer Science Press
KW  - Database management
N1  - Includes index
ER  -