TY  - BOOK
AU  - Nijssen, G. M.
AU  - Halpin, T. A.
TI  - Conceptual scheme and relational database design: a fact oriented approach
SN  - 0131672630
U1  - 001.6442 
PY  - 1989///
CY  - New York
PB  - Prentice Hall
ER  -