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theme_ss:"Konzeption und Anwendung des Prinzips Thesaurus"
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theme_ss:"Semantisches Umfeld in Indexierung u. Retrieval"
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Shapiro, C.D.; Yan, P.-F.: Generous tools : thesauri in digital libraries (1996)
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Sihvonen, A.; Vakkari, P.: Subject knowledge improves interactive query expansion assisted by a thesaurus (2004)
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