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  • × author_ss:"Ullah, A."
  • × theme_ss:"Klassifikationstheorie: Elemente / Struktur"
  • × year_i:[2010 TO 2020}
  1. Ullah, A.; Khusro, S.; Ullah, I.: Bibliographic classification in the digital age : current trends & future directions (2017) 1.00 
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