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Fugmann, R.: Obstacles to progress in mechanized subject access and the necessity of a paradigm change (2000)
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Pollitt, A.S.: Intelligent interfaces to online databases (1990)
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Frohmann, B.: Rules of indexing : a critique of mentalism in information retrieval theory (1990)
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Janes, J.W.: ¬An alternative to precision (1991)
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Perry, J.W.: Mechanized searching and subject headings (1953)
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