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  1. Unesco thesaurus : a structured list of descriptors for indexing and retrieving literature in the fields of education, science, social science, culture and communication (1977) 11.01 
    11.008321 = weight(rvk_ss:AN 94500 in 424) [ClassicSimilarity], result of:
  11.008321 = fieldWeight in 424, product of:
    1.0 = tf(freq=1.0), with freq of:
      1.0 = termFreq=1.0
    11.008321 = idf(docFreq=1, maxDocs=44421)
    1.0 = fieldNorm(doc=424)
    Classification
    AN 94500
    Rvk
    AN 94500