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  • × classification_ss:"Bib A 291 / OPAC"
  1. ¬The Online catalogue : developments and directions (1989) 4.54
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  2. ¬Der Online-Publikumskatalog der Universitätsbibliothek Düsseldorf : Methodische Erkenntnisse und Erfahrungen; OPAC-Kolloquium am 27.-28.11.1989 (1991) 4.54
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