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Sullivan D.: ¬The major search engines (1998)
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Sullivan D.: How search engines rank web pages (1998)
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Sullivan D.: How search engines work (1998)
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Sullivan D.: ¬The webmaster's guide to search engines and directories (1996)
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Sullivan, J.: Why a new FirstSearch? (1999)
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Scoville, R.: Find it on the net (1996)
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Tomaiuolo, N.G.; Packer, J.G.: ¬An analysis of Internet search engines : assessment of over 200 search queries (1996)
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Heidenreich, F.: Know your search engine : a comparison of 6 popular Web search engines (1997)
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Hock, R.E.: How to do field searching in Web search engines : a field trip (1998)
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