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  1. Reference and information services : an introduction (1995) 0.01 
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    Date
    8. 3.2008 9:52:56
  2. Kuhlen, R.: ¬Die Konsequenzen von Informationsassistenten : was bedeutet informationelle Autonomie oder wie kann Vertrauen in elektronische Dienste in offenen Informationsmärkten gesichert werden? (1999) 0.01 
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    Date
    28. 8.2019 19:21:22

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