The paper The Data Model of IDE: A Value Network was published in the proceedings of the 1985 IEEE-sponsored conference "The Fourth International Conference on Entity-Relationship Approach (ER 1985). Chicago"
Thereafter, papers of other conferences in the series were made available in ACM's digital library, but not those of this conference. There is an ACM web page for the conference but inspection shows that no papers are actually accessible.
So, for the present, here is a currently recommended copyright notice for personal copies as suggested in the "IEEE Publication Services and Products Board Operations Manual 2020":
“©1985 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.”
and here is the link to my personal copy of the paper.