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  • × classification_ss:"025.4/31 / dc20"
  1. Comaroni, J.P.; Satija, M.P.: Exercises in the 20th edition of the Dewey Decimal Classification (1990) 0.06 
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    Classification
    025.4/31 / dc20
    DDC
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  2. Davis, S.W.: DDC 20 workbook : a practical introduction to the Dewey Decimal Classification (1992) 0.05 
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    Classification
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    DDC
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