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Pao, M.L.: Concepts of information retrieval (1989)
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Booth, P.F.; South, M.L.: Information filing and finding (1982)
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Root thesaurus. Pt.1.2 (1985)
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Kumar, K.: Theory of classification (1989)
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Lancaster, F.W.: Vocabulary control for information retrieval (1986)
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Miller, E.: Prince of librarians : the life and times of Antonio Panizzi of the British Museum (1988)
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Chafe, W.L.: Meaning and the structure of language (1980)
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