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Eichler, F.: Wert und Verhältnis des systematischen und des Schlagwortkatalogs (1924)
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Bock, F.: Zur Geschichte des Schlagwortkatalogs in Praxis und Theorie (1923)
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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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