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  • × year_i:[1990 TO 2000}
  • × author_ss:"Leydesdorff, L."
  1. Leydesdorff, L.: ¬The generation of aggregated journal-journal citation maps on the basis of the CD-ROM version of the Science Citation Index (1994) 0.01 
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    Date
    20.10.2000 11:21:56