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Connell, T.H.: Librarian subject searching in online catalogs : an exploratory study of knowledge used (1991)
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Hjoerland, B.: Subject representation and information seeking : contributions to a theory based on the theory of knowledge (1993)
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Burnett, A.J.: ¬An exploratory study of hypertext processing strategies (1991)
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Perez, E.R.: ¬A study of traditional information access models applied to a hypertext information system (1991)
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Retterer, O.J.: Learning from a hypertext (1991)
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