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Biswas, S.C.; Smith, F.: Efficiency and effectiveness of deep structure based indexing languages : PRECIS vs. DSIS (1991)
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Cousins, S.A.: Enhancing subject access to OPACs : controlled vocabulary vs. natural language (1992)
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Congreve, J.: Subject access (1991)
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Austin, D.: Derek Austin : developing PRECIS, Preserved Context Index System (1998)
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Tonta, Y.: LCSH and PRECIS in library and information science : a comparative study (1992)
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