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Füchsel, J.: ¬Ein schwedisches Realkatalogschema (1922)
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Fellows, D.: Library of Congress Classification vs. decimal classification (1925)
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Pfenning, R.: Unser Realkatalog (1921)
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Meyer, A.: Systematischer und Schlagwortkatalog : Probleme des Realkatalogs, 3 (1923)
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Luther, A.: ¬Der Sachkatalog (1925)
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Schleimer, H.: ¬Der bibliothekarische Schlagwortkatalog : Mit Regeln für die Universitätsbibliothek Graz und einem Anhang: Systematischer oder alphabetischer Sachkatalog? (1923)
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Weltsch, F.: ¬Der "engste Begriff" oder Gruppenbildung : ein Grundproblem des Schlagwortkataloges (1928)
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Lysen, A.: ¬Ein "¬verbesserter Index" zum systematischen Katalog (1925)
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Schunke, I.: ¬Die systematischen Ordnungen und ihre Entwicklungen : Versuch einer geschichtlichen Übersicht (1927)
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Meyer, A.: Zeitlich begrenzte Realkataloge (1922)
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