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  • × classification_ss:"025.3/132/0943 / dc20"
  • × language_ss:"d"
  • × subject_ss:"Information Retrieval (BVB)"
  1. ¬Der Online-Publikumskatalog der Universitätsbibliothek Düsseldorf : Methodische Erkenntnisse und Erfahrungen; OPAC-Kolloquium am 27.-28.11.1989 (1991) 1.00 
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