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Mulvany, N.C.: Software tools for indexing : what we need (1990)
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Ward, M.L.: ¬The future of the human indexer (1996)
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Chung, E.-K.; Miksa, S.; Hastings, S.K.: ¬A framework of automatic subject term assignment for text categorization : an indexing conception-based approach (2010)
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Lancaster, F.W.: Trends in subject indexing from 1957 to 2000 (1980)
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Prasher, R.G.: Evaluation of indexing system (1989)
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