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Grasberger, F.: Systematischer Schlagwortkatalog (1951)
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- Source
- Zentralblatt für Bibliothekswesen. 65(1951), S.260-273
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Roloff, H.: Probleme des Schlagwortkatalogs (1958)
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- Source
- Zentralblatt für Bibliothekswesen. 72(1958), S.101-107
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Fock, J.: 'Katalog der Wissenschaften' und 'Katalog der Sachen' (1959)
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