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Bean, C.: ¬The semantics of hierarchy : explicit parent-child relationships in MeSH tree structures (1998)
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Michel, D.: Taxonomy of Subject Relationships (1997)
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Tudhope, D.; Alani, H.; Jones, C.: Augmenting thesaurus relationships : possibilities for retrieval (2001)
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ALA / Subcommittee on Subject Relationships/Reference Structures: Final Report to the ALCTS/CCS Subject Analysis Committee (1997)
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