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Dahlberg, I.: Grundlagen universaler Wissensordnung : Probleme und Möglichkeiten eines universalen Klassifikationssystems des Wissens (1974)
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Broughton, V.: Concepts and terms in the faceted classification : the case of UDC (2010)
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Heuvel, C. van den: Multidimensional classifications : past and future conceptualizations and visualizations (2012)
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Faceted classification today : International UDC Seminar 2017, 14.-15. Spetember, London, UK. (2017)
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