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Austin, D.; Digger, J.A.: PRECIS: The Preserved Context Index System (1985)
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Bakewell, K.G.B.: Indexers' reactions to PRECIS (1979)
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Rowley, J.E.: CD-ROM versus online : an evaluation of the effects of the user interface on search effectiveness; a pilot study (1989)
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Congreve, J.: Problems of subject access : automatic generation of printed indexes and online thesaural control (1986)
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Gödert, W.: ¬The design of subject access elements in online catalogues : Some problems (1991)
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