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Feldman reports Internet search challenge results (1998)
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Saracevic, T.; Kantor, P.: Online searching : still an imprecise art (1991)
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Dow Jones unveils knowledge indexing system (1997)
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Klingener, A.: DIALOG Web : finally it's arrived (1997)
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Feldman, S.: Testing natural language : comparing DIALOG, TARGET, and DR-LINK (1996)
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