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Schmidt, D.: Telefon und Telex als Hilfsmittel des Informationsdienstes in Öffentlichen Bibliotheken : Analyse in- uns ausländischer Fachbeiträge (1976) 0.02

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Schmidt, D.: Vergleichende Untersuchung von Klassifikationsregistern in Öffentlichen Bibliotheken : unter besonderer Berücksichtigung der ASB (Allgemeine Systematik für Öffentliche Bibliotheken) (1980) 0.00

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