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Rensman, J.: Blick ins Getriebe (1999)
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MacLeod, R.: Promoting a subject gateway : a case study from EEVL (Edinburgh Engineering Virtual Library) (2000)
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Dunning, A.: Do we still need search engines? (1999)
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Hock, R.E.: How to do field searching in Web search engines : a field trip (1998)
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