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Aluri, R.D.; Kemp, A.; Boll, J.J.: Subject analysis in online catalogs (1991)
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¬The UDC : Essays for a new decade (1990)
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Classification research for knowledge representation and organization : Proc. of the 5th Int. Study Conf. on Classification Research, Toronto, Canada, 24.-28.6.1991 (1992)
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