TY - BOOK AU - Pernul G ED - International Conference on Entity Relationship Approach( 11th : 1992 : Germany ) ED - International Conference on Entity Relationship Approach 11th TI - Entity relationship approach : procddeings SN - 3-540-56023-8 U1 - 5.74 PY - 1992/// CY - Berlin PB - Springer Verlag KW - Data base KW - Entity relationship ER -