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Rigg, J.A.: Secondary school libraries in Zambia : some statistics and comments (1979)
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Dehnhard, H.: Gutachten zur Frage einer Einheitsklassifikation für die Bibliotheken der Bundesrepublik Deutschland (1972)
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Birket-Smith, K.: ¬Die Klassifikation der Library of Congress mit ausländischen Augen gesehen (1972)
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