TY  - BOOK
AU  - Ullman,Jeffrey D.
TI  - Principles of database systems
T2  - Computer software engineering series
SN  - 0-273-08594-8
AV  - QA76.9D3 U44 1982
PY  - 1982///
CY  - Rockville, maryland
PB  - Computer science
KW  - Administración de bases de datos
ER  -