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  • × year_i:[1970 TO 1980}
  • × type_ss:"h"
  1. Einführung in die Handhabung der Internationalen Patentklassifikation (1977) 0.00 
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    Pages
    31 S
  2. Robinson, G.: Universal Decimal Classification : a brief introduction (1979) 0.00 
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    8 S

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