TY  - GEN
AU  - Gray, Peter M. D.,
AU  - Kulkarni, Krishnarao G.
AU  - Paton, Norman W.
TI  - Object-oriented databases: a semantic data model approach 
T2  - Prentice-Hall international series in computer science
SN  - 0136302033 :
AV  - QA76.9.D3 G7222 1992
PY  - 1992///
CY  - New York
PB  - Prentice Hall
KW  - Object-oriented databases
N1  - Includes bibliographical references (p. 218-230) and index
ER  -