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Biswas, S.C.; Smith, F.: Computerized Deep Structure Indexing System : a critical appraisal (1988)
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Biswas, S.C.; Smith, F.: Term and cross reference structure in computerized Deep Structure Indexing System (1988)
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Biswas, S.C.; Smith, F.: Classed thesauri in indexing and retrieval : a literature review and critical evaluation of online alphabetic classaurus (1989)
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