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Burkart, M.; Wersig, G.: ¬Die Nutzung der DK in der Bundesrepublik Deutschland und Österreich : Ergebnisse einer Umfrage im Sommer 1981 im Auftrag der Gesellschaft für Information und Dokumentation (1982)
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Burkart, M.; Wersig, G.: Nutzung von Klassifikationssystemen in deutschen IuD-Stellen : Ergebnisse einer Umfrage im Winter 1980/81 (1981)
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Seeger, T.; Burkart, M.; Wersig, G.: IuD-Stellen in der Bundesrepublik Deutschland : Repräsentativität einer Umfrage zur Nutzung von Klassifikationssystemen (1981)
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