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Harman, D.: Overview of the Second Text Retrieval Conference : TREC-2 (1995)
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Smeaton, A.F.; Harman, D.: ¬The TREC experiments and their impact on Europe (1997)
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Harman, D.: Overview of the first Text Retrieval Conference (1993)
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Harman, D.: ¬The Text REtrieval Conferences (TRECs) : providing a test-bed for information retrieval systems (1998)
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