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  • × theme_ss:"Informationsdienstleistungen"
  • × theme_ss:"Informationsmittel"
  • × year_i:[1990 TO 2000}
  1. Tenopir, C.; Ennis, L.: ¬The digital reference work of academic libraries (1998) 0.05
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    Source
    Online. 22(1998) no.4, S.22-28
  2. Koutnik, C.: ¬The World Wide Web is here : is the end of printed reference sources near? (1997) 0.01
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