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ddc_ss:"025.4/31 / dc20" 2

Scott, M.L.: Dewey Decimal Classification, 21st edition : a study manual and number building guide (1998) 11.01

11.008321 = weight(ddc_ss:025.4/31 / dc21 in 2454) [ClassicSimilarity], result of:
  11.008321 = fieldWeight in 2454, 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=2454)

Classification: 025.4/31 / dc21
Ddc: 025.4/31 / dc21