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  • × classification_ss:"AN 12560"
  • × theme_ss:"OPAC"
  • × type_ss:"s"
  1. ¬Der Online-Publikumskatalog der Universitätsbibliothek Düsseldorf : Methodische Erkenntnisse und Erfahrungen; OPAC-Kolloquium am 27.-28.11.1989 (1991) 0.00 
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