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  • × theme_ss:"Informationsdienstleistungen"
  • × theme_ss:"Informationsmittel"
  • × type_ss:"i"
  1. Informationsdienst an Öffentlichen Bibliotheken der Bundesrepublik Deutschland (1986) 0.01 
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  2. Katz, W.A.: Introduction to reference work : Vol.1: Basic information sources; vol.2: Reference services and reference processes (1992) 0.00 
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