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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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Roberts, D.; Souter, C.: ¬The automation of controlled vocabulary subject indexing of medical journal articles (2000)
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Tsay, M.-y.: Literature growth, journal characteristics, and suthor productivity in subject indexing, 1977 to 2000 (2004)
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