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Fick, R.: Gesamt-Realkataloge (1921)
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Füchsel, J.: Richtlinien für die Anlage von Schlagwortkatalogen (1927)
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Fick, R.: ¬Die Kataloge der Druckschriftenabteilung (1921)
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Pfenning, R.: Unser Realkatalog (1921)
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Kaiser, J.: Systematic indexing (1926)
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Füchsel, J.: ¬Ein schwedisches Realkatalogschema (1922)
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