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Rieh, S.Y.; Kim, Y.-M.; Markey, K.: Amount of invested mental effort (AIME) in online searching (2012)
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Wells, A.: Subject access and languages other than English (1993)
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Makri, S.; Blandford, A.; Gow, J.; Rimmer, J.; Warwick, C.; Buchanan, G.: ¬A library or just another information resource? : a case study of users' mental models of taditional and digital libraries (2007)
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Pienaar, R.E.: Enhancement of subject access in online public access catalogues (OPACs) (1989)
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Vasiljev, A.: Online subject access to library holdings (1986)
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