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Ingwersen, P.; Wormell, I.: Modern indexing and retrieval techniques matching different types of information needs (1989)
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Ingwersen, P.; Wormell, I.: Ranganathan in the perspective of advanced information retrieval (1992)
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Wormell, I.: SAP: a new way to produce subject description of books (1981)
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Wormell, I.: Factual data retrieval according to SAP-technique (1983)
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Wormell, I.: Subject access project - SAP : Improved subject retrieval for monographic publications (1985)
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Araújo, P.C. de; Gutierres Castanha, R.C.; Hjoerland, B.: Citation indexing and indexes (2021)
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Pienaar, R.E.: Enhancement of subject access in online public access catalogues (OPACs) (1989)
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Holley, R.P.; Drabenstott, K.M.: ¬An interview with Karen M. Drabenstott (2001)
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