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  • × year_i:[1970 TO 1980}
  • × type_ss:"d"
  1. Engelien, G.: ¬Der Begriff der Klassifikation (1971) 0.00 
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    Series
    Forschungsberichte des Instituts für Kommunikationsforschung und Phonetik der Universität Bonn; Bd.36
  2. Fenichel, C.H.: Online information retrieval : identification of measures that discriminate among users with different levels of types of experience (1979) 0.00 
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  3. Tahani, V.: ¬A general conceptual framework for information retrieval systems (1972) 0.00 
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    Abstract
    Develops a conceptual framework for information retrieval systems which admit of imprecision in the form of fuzziness in document characterization, retrieval rules, and file structures. A mathematical model for such systems, based on the theory of fuzzy sets, is introduced

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