TY  - BOOK
AU  - Vossen, Gottfried 
TI  -  Data models, database languages and database management systems / : Cottfried Vossen
SN  - 0201416042
U1  - 005.74 23
PY  - 1991///
CY  - Workingham : 
PB  - Addison-Wesley pub, 
KW  - Database systems
KW  - Database management
ER  -