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Bhattacharyya, G.: POPSI: a system for depth indexing (1985)
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Khanna, J.K.: Analytico-synthetic classification : (a study in CC-7) (1994)
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Devadason, F.J.: Online construction of alphabetic classaurus : a vocabulary control and indexing tool (1985)
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Classification Research Group: ¬The need for a faceted classification as the basis of all methods of information retrieval (1985)
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Devadason, F.J.: Postulate-Based Permuted Subject Indexing Language as a metalanguage for computer-aided generation of information retrieval thesaurus (1983)
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