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theme_ss:"Semantisches Umfeld in Indexierung u. Retrieval"
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theme_ss:"Suchtaktik"
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type_ss:"a"
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year_i:[2000 TO 2010}
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Mandala, R.; Tokunaga, T.; Tanaka, H.: Query expansion using heterogeneous thesauri (2000)
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Johnson, J.D.: On contexts of information seeking (2003)
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