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Humphrey, S.M.: Use and management of classification systems for knowledge-based indexing (1992)
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Humphrey, S.M.: Indexing biomedical documents : from thesaural to knowledge-based retrieval systems (1992)
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Kiren, T.: ¬A clustering based indexing technique of modularized ontologies for information retrieval (2017)
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Thiel, T.J.: Automated indexing of document image management systems (1992)
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