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Richards, D.: INSPEC Ondisc : design consideration (1991)
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Smith, M.P.; Pollitt, A.S.: Ranking and relevance feedback extensions to a view-based searching system (1995)
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Plaunt, C.; Norgard, B.A.: ¬An association-based method for automatic indexing with a controlled vocabulary (1998)
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Wheeler, G.: Maintaining a controlled vocabulary for a large online database service (1991)
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