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Ercegovac, Z.: Minimal level cataloging : what does it mean for maps in the contexts of card catalogs, online catalogs, and digital libraries? (1998)
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Hancock-Beaulieu, M.; Fieldhouse, M.; Do, T.: ¬A graphical interface for OKAPI : the design and evaluation of an online catalogue system with direct manipulation interaction for subject access (1994)
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Lim, A.: User perception of help features in library automation systems (1996)
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Stoecker, N.K.; Alford, D.L.: From catalog to Web : desktop access to Sandia technical reports (1998)
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Nohr, H.: Subject access in german-language OPACs : a survey (1989)
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