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  • × year_i:[1970 TO 1980}
  1. Schmidt, A.F.: ¬Die langfristige Umwandlung der DK in eine universelle Facettenklassifikation (1973) 10.09
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    Author
    Schmidt, A.F.
  2. Schmidt, A.F.: Gedanken zur Reform der Dezimalklassifikation (1972) 10.09
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    Author
    Schmidt, A.F.
  3. Schmidt, A.F.; Wijn, J.H. de: Some possibilities for a new 'reformed' UDC (1972) 10.09
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    Author
    Schmidt, A.F.

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