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Laureilhe, M.T.: Essai de bibliographie des thesauri et index par matières parus depuis 1960 (1969)
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Andersen, J.: ¬The concept of genre in information studies (2008)
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Neelameghan, A.; Gopinath, M.A.: Classificationist and the study of the structure and development of the universe of subjects : classification research 1963-1967, trend report (1967)
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