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Gahl, R.: Telefon und Telex als Hilfsmittel des Informationsdienstes in Öffentlichen Bibliotheken : Analyse in- und ausländischer Fachbeiträge (1976)
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Langen, D.: Telefon und Telex als Hilfsmittel des Informationsdienstes in Öffentlichen Bibliotheken : Analyse in- und ausländischer Fachbeiträge (1976)
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Schmidt, D.: Telefon und Telex als Hilfsmittel des Informationsdienstes in Öffentlichen Bibliotheken : Analyse in- uns ausländischer Fachbeiträge (1976)
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Rienermann, A.: Aufstellung von Informationsbeständen : Analyse in- und ausländischer Fachbeiträge und deutscher Klassifikationen Öffentlicher Bibliotheken sowie Entwurf eines Aufstellungsschemas für Sachauskunftsmittel (1980)
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Bunzel, A.: Organisation des Informationsdienstes : Darstellung der Hauptprobleme anhand in- und ausländischer Fachbeiträge sowie vergleichende Untersuchung in drei Öffentlichen Bibliotheken (1977)
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