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Hahn, G.: ¬Die Bibliothek des Deutschen Bundestages : Informationsbasis für die parlamentarische Arbeit (1983)
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Hahn, G.: ¬Die 'vorwiegend formalen' Kataloge der Bibliothek des Deutschen Bundestages (1980)
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Hahn, G.: Methodik der inhaltlichen Erschließung bibliographisch unselbständiger Literatur (Aufsatzkatalogisierung) (1992)
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Hahn, G.: Erschließung von Kleinliteratur in Direktablagen (1992)
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Hahn, G.: ¬Die Bibliothek des Wissenschaftlichen Dienstes des US-Kongresses : Eine Bibliothek in der Library of Congress (1985)
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Hahn, G.: ¬Die Entwicklung der Wirtschaftswissenschaften im Spiegel von Klassifikationssystemen : ein Beitrag zur Wissenschafts- und Klassifikationskunde der Nationalökonomie (1978)
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Hahn, G.: Sacherschließung durch Schlagwortkataloge : theoretische und praktische Fragen, dargestellt am Beispiel der Bibliotheken der Industrie- und Handelskammern (1983)
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Hahn, G.: ¬Die Klassifikation der Rechtsliteratur in der Bibliothek des Deutschen Bundestages (1981)
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Hahn, G.: Catalogues and the documentation system of the Library of the German Bundestag (1977)
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Hahn, G.: Keine Bibliothek wie jede andere : Anmerkungen zur Sacherschließung der Bibliothek des Deutschen Bundestages - vom systematischen Karten-Katalog zum Online-Katalog (1987)
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Hahn, G.: ¬Die historischen Komponenten des Katalogsystems der Bibliothek des Deutschen Bundestages (1987)
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Hahn, G.: ¬Der Zusammenhang von Systemzweck, Sachgebiet, inhaltlicher Literaturauswertung und Katalog in der Bibliothek des Deutschen Bundestages (1980)
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Hahn, G.: ¬Die Kataloge der Reichstagsbibliothek zu Berlin und der Aufbau des Katalogsystems der Bibliothek des Deutschen Bundestages (1986)
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Hahn, G.: Information und Dokumentation in der Bibliothek des Deutschen Bundestages : ein Beispiel der Praxis für die Einheit bibliothekarischer und dokumentarischer Prinzipien (1978-79)
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