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Fenichel, C.H.: Online information retrieval : identification of measures that discriminate among users with different levels of types of experience (1979)
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Engelien, G.: ¬Der Begriff der Klassifikation (1971)
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Schabas, A.H.: ¬A comparative evaluation of the retrieval effectiveness of titles, Library of Congress Subject Headings and PRECIS strings for computer searching of UK MARC data (1979)
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Tahani, V.: ¬A general conceptual framework for information retrieval systems (1972)
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