Researchr is a web site for finding, collecting, sharing, and reviewing scientific publications, for researchers by researchers.
Sign up for an account to create a profile with publication list, tag and review your related work, and share bibliographies with your co-authors.
E. F. Codd. Recent Investigations in Relational Data Base Systems. In ACM Pacific. pages 15-20, 1975. [doi]
Abstract is missing.