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Grasberger, F.: Systematischer Schlagwortkatalog (1951)
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Roloff, H.: Probleme des Schlagwortkatalogs (1958)
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Schmidt, P.: Über den Basler Schlagwortkatalog (1952)
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Fock, J.: 'Katalog der Wissenschaften' und 'Katalog der Sachen' (1959)
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Seyffert, H.: Über den Schlagwortkatalog der Universitätsbibliothek Kiel (1955)
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