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  • × year_i:[1960 TO 1970}
  • × type_ss:"m"
  1. Perreault, J.M.: Towards a theory for UDC : essays aimed at structural understanding and operational improvement (1969) 8.92 
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    Author
    Perreault, J.M.
  2. Perreault, J.M.: ¬An introduction to Universal Decimal Classification (1969) 8.92 
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    Perreault, J.M.