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  • × author_ss:"Shachaf, P."
  • × theme_ss:"Informationsdienstleistungen"
  • × year_i:[2000 TO 2010}
  1. Shachaf, P.; Oltmann, S.M.; Horowitz, S.M.: Service equality in virtual reference (2008) 1.00 
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  2. Shachaf, P.: ¬The paradox of expertise : is the Wikipedia Reference Desk as good as your library? (2009) 1.00 
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