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Keitz, W. von: Automatic indexing and the dissemination of information (1986)
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Sparck Jones, K.; Jackson, D.M.: ¬The use of automatically obtained keyword classification for information retrieval (1970)
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Stiles, H.E.: ¬The association factor in information retrieval (1961)
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Maron, M.E.: Automatic indexing : an experimental inquiry (1961)
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Bookstein, A.; Swanson, D.R.: Probabilistic models for automatic indexing (1974)
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