Peter Chen,International Conference on Entity-Relationship Approach to Systems Analysis and Design.International Conference on Entity-Relationship Approach to Systems Analysis and Design (1979 : Los Angeles )：Entity-Relationship Approach to Systems Analysis and Design.North-Holland,1980.
International Conference on Entity-Relationship Approach to Systems Analysis and Design (1979 : Los Angeles )：Entity-Relationship Approach to Systems Analysis and Design
Peter Chen,International Conference on Entity-Relationship Approach to Systems Analysis and Design.North-Holland,1980.
