TY  - BOOK
AU  - Sernadas, A. (Ed.)
TI  - Information systems: : Proceedings of the IFIP TC 8.1 working conference on theoretical and formal aspects of information systems
PY  - 1985///
CY  - Amsterdam: 
PB  - North- Holland, 
KW  - Information science
KW  - Entity-relationship
ER  -