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H. Auer, W. Hell, Hans-Otto Leilich, J. S. Lie, Heinz Schweppe, S. Seehusen, Günther Stiege, W. Teich, Hans Christoph Zeidler. RDBM - A relational data base machine. Inf. Syst., 6(2):91-100, 1981.
Abstract is missing.