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  • × theme_ss:"Informationsmittel"
  1. Neumann, G.: Online-Recherchen in der Schulbibliothek : Btx als Umwelt-Informationsquelle (1995) 8.33 
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  2. Mahnkopf, P.: Endkundensysteme in T-Online, Datex-J, Btx (1997) 8.33 
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  3. Wegner, J.: Recherche online : Ein Handbuch für Journalisten (1998) 8.33 
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