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.
Mostafa A. Bassiouni, Mark J. Llewellyn. A Relational-Calculus Query Language for Historical Databases. Computer Languages, Systems \& Structures, 17(3):185-197, 1992.
Abstract is missing.