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Croucher, C.: Problems of subject access : user studies and interface design (1986)
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Austin, D.; Digger, J.A.: PRECIS: The Preserved Context Index System (1985)
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Congreve, J.: Subject access (1991)
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Hsueh, L.-K.: ¬The application of PRECIS in indexing Chinese documents : an experimental study (1993)
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Hyman, R.J.: Information access : Capabilities and limitations of printed and computerized sources (1989)
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