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author_ss:"Willett, P."
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language_ss:"e"
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theme_ss:"Retrievalstudien"
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theme_ss:"Semantisches Umfeld in Indexierung u. Retrieval"
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type_ss:"a"
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year_i:[1990 TO 2000}
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Ekmekcioglu, F.C.; Robertson, A.M.; Willett, P.: Effectiveness of query expansion in ranked-output document retrieval systems (1992)
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1.0 = *:*, product of: 1.0 = boost 1.0 = queryNorm