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Sieverts, E.: Citatie-zoeken op het Web (1997)
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Cree, J.S.; LeBruin, R.: ¬The search for the best engine (1998)
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Lin, Z.; Baoming, Z.: Comparative study of WWW search tools (1998)
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Hock, R.E.: How to do field searching in Web search engines : a field trip (1998)
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Internet search tool details (1996)
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