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Sievert, M.E.; McKinin, E.J.; Slough, M.: ¬A comparison of indexing and full-text for the retrieval of clinical medical literature (1988)
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Sievert, M.E.; McKinin, E.J.: Why full-text misses some relevant documents : an analysis of documents not retrieved by CCML or MEDIS (1989)
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MacCain, K.W.; White, H.D.; Griffith, B.C.: Comparing retrieval performance in online data bases (1987)
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