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Liu, S.; Svenonius, E.: DORS: DDC online retrieval system (1991)
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- Library resources and technical services. 35(1991), S.359-375
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Svenonius, E.; Liu, S.; Subrahmanyam, B.: Automation of chain indexing (1992)
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- S.351-364
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Liu, S.: Decomposing DDC synthesized numbers (1997)
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- International cataloguing and bibliographic control. 26(1997) no.3, S.58-62
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Liu, S.: Decomposing DDC synthesized numbers (1996)
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