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Parameswaran, M.: Chain procedure and Dewey Decimal Classification (1990)
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Sukiasyan, E.: ¬The ideas of S.R. Ranganathan in Russia : Results and tendencies (1992)
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Fugmann, R.: Book indexing : the classificatory approach (1994)
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Patwardhan, D.V.: Chain indexing : a new look at old technique (1988)
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Loosjes, T.P.; Tichelaar, P.A.; Goossens, J.; Stuurman, P.: Ontsluiting op onderwerp (1977)
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