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Dahlberg, I.: Grundlagen universaler Wissensordnung : Probleme und Möglichkeiten eines universalen Klassifikationssystems des Wissens (1974)
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Panigrahi, P.: Ranganathan and Dewey in hierarchical subject classification : some similarities (2015)
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Satija, M.P.; Oh, D.-G.: ¬The DDC and the knowledge categories : Dewey did faceting without knowing it (2017)
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