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Salton, G.: ¬A theory of indexing (1975)
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Schneider, J.H.: ¬A classification of information science and library science topics plus an alphabetical index to the classification (1975)
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Leonard, L.E.: Inter-indexer consistency studies, 1954-1975 : a review of the literature and summary of study results (1977)
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¬A classification of library and information science (1975)
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