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.
Shamkant B. Navathe, James P. Fry. Restructuring for Large Data Bases: Three Levels of Abstraction. ACM Trans. Database Syst., 1(2):138-158, 1976. [doi]
Abstract is missing.