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Wartena, C.; Sommer, M.: Automatic classification of scientific records using the German Subject Heading Authority File (SWD) (2012)
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Münnich, M.: REUSE or rule harmonization : just a project? (2000)
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Liu, S.: Decomposing DDC synthesized numbers (1996)
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Beall, J.: Editing the Dewey Decimal Classification online : the evolution of the DDC database (1992)
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Larson, R.R.: Experiments in automatic Library of Congress Classification (1992)
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