E. F. Codd, C. J. Date. Interactive Support For Non-Programmers: The Relational and Network Approaches. In Randall Rustin, editor, Proceedings of 1974 ACM-SIGMOD Workshop on Data Description, Access and Control, Ann Arbor, Michigan, May 1-3, 1974, 2 Volumes. pages 11-41, ACM, 1974. [doi]
Abstract is missing.