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Shera, J.H.: Libraries and the organization of knowledge (1965)
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Shera, J.H.; Egan, M.: ¬The classified catalog : Basic principles and practices (1956)
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Shera, J.H.; Cleveland, D.B.: History and foundations of information science (1977)
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Snow, D.C.: Why 'hybrid' information systems? (1989)
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Hobbs, J.R.: Sketch of an ontology underlying the way we talk about the world (1995)
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Xu, Y.; Wang, D.: Order effect in relevance judgment : mediation and causality (2008)
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Hjoerland, B.: Classification (2017)
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Pichappan, P.: Levels of citation relation between papers (1996)
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