TY  - BOOK
AU  - Ullman,Jeffrey D.
TI  - Principles of database systems
T2  - Computer software engineering series
SN  - 0914894366
AV  - QA76.9.D3 
U1  - 001.64 
PY  - 1983///
CY  - Rockville, Md.
PB  - Computer Science Press
KW  - Database management
N1  - Includes index; Bibliography: p. [451]-473
ER  -