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Walker, S.; Jones, R.M.: Improving subject retrieval in online catalogues : T.1: Stemming, automatic spelling correction and cross-reference tables (1987)
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Wiesenmüller, H.: Verbale Erschließung in Katalogen und Discovery-Systemen : Überlegungen zur Qualität (2021)
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Fujita, M.; Lopes, L.; Moreira, W.; Piovezan dos Santos, L.B.; Andrade e Cruz, M.C.; Rodrigues de Barros Ribas, R.: Construction and evaluation of hierarchical structures of indexing languages for online catalogs of libraries : an experience of the São Paulo State University (UNESP) (2018)
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