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Hsieh-Yee, I.: ¬The retrieval power of selected search engines : how well do they address general reference questions and subject questions? (1998)
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Peterson, R.E.: Eight Internet search engines compared (1996)
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Maze, S.; Moxley, D.; Smith, D.J.: Authoritative guide to Web search engines (1997)
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Lin, Z.; Baoming, Z.: Comparative study of WWW search tools (1998)
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Ding, W.; Marchionini, G.: ¬A comparative study of Web search service performance (1996)
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Courtois, M.P.; Baer, W.M.; Stark, M.: Cool tools for searching the Web : a performance evaluation (1995)
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