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Hock, R.: ¬A new era of search engines : not just Web pages anymore (2002)
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Hock, R.: ¬The latest field trip : an update on field searching in Web search engines (2004)
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Hock, R.: Web search engines : more features and commands (2000)
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Hock, R.: ¬The extreme searcher's guide to Web search engines : a handbook for the serious searcher (2001)
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Hock, R.: Search engines (2009)
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