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  • × author_ss:"Langfeldt, J."
  1. Langfeldt, J.: Zum Problem und zur Geschichte der Systematik : T.1-2. (1957) 0.02 
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    Theme
    Geschichte der Klassifikationssysteme
  2. Langfeldt, J.: Über den Schlagwortkatalog der belehrenden Literatur (1930) 0.02 
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    Theme
    Geschichte des Schlagwortkataloges

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