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  1. Kramer, J.: Zur Revision der Fächersystematiken (2015) 0.01
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    Source
    Mitteilungen der Deutschen Mathematiker-Vereinigung. 2015, H.1, S.18-20
  2. Pika, J.: Klassifikation Erdwissenschaften : Eine neue Klassifikation für die erdwissenschaftliche Bibliothek der ETH Zürich (2004) 0.00
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    Source
    Information - Wissenschaft und Praxis. 55(2004) H.3, S.147-150

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