Proceedings of the IFIP WG 2.6 Working Conference on Data Semantics (DS-1). Hasselt, Belgium, January 7-11, 1985.

Thomas B. Steel Jr. Robert Meersman Proceedings of the IFIP WG 2.6 Working Conference on Data Semantics (DS-1). Hasselt, Belgium, January 7-11, 1985. DS-1 North-Holland 1986 0-444-70004-8 db/conf/ds/ds85.html