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Pienaar, R.E.: Enhancement of subject access in online public access catalogues (OPACs) (1989)
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D'Angelo, R.: Main entry in the automation age : a review of the theory (1997)
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Schuhböck, H.P.: EDV-Katalogisierung und Online-Benutzerkatalog : Möglichkeiten und Probleme neuer Erschließungstechniken in Öffentlichen Bibliotheken (1989)
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Voshida, K.: ¬A study on improving subject access to the OPAC : a survey of catalogue use comparing an OPAC and a card catalogue in a private university library (1994)
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Poulsen, C.: Tables of contents in library catalogs : a quantitative examination of analytic catalogs (1996)
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