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  • × author_ss:"Ernestus, H."
  • × theme_ss:"Informationsdienstleistungen"
  1. Ernestus, H.: Auf dem Wege zum Auskunftsdienst (1969) 0.01 
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  2. Ernestus, H.: Auskunftsdienst: Standards und Realisierung (1973) 0.01 
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