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author_ss:"Clarke, S.J."
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author_ss:"Willett, P."
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theme_ss:"Retrievalstudien"
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year_i:[1990 TO 2000}
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Clarke, S.J.; Willett, P.: Estimating the recall performance of Web search engines (1997)
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1.0 = *:*, product of: 1.0 = boost 1.0 = queryNorm