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McIlwaine, I.C.: Universal Decimal Classification (UDC) (2009)
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Strachan, P.D.; Oomes, F.M.H.: Universal Decimal Classification update (1995)
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Chan, L.M.: Library of Congress Classification : alternative provisions (1995)
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Martin, G.: Report on the Dewey Decimal Classification editorial Policy Committee (EPC) (1994)
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Porter, M.; Galpin, V.: Relevance feedback in a public access catalogue for a research library : Muscat at the Scott Polar Research Institute (1988)
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