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Wilson, T.D.: Recent trends in user studies : action research and qualitative methods (2000)
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Hildreth, C.R.: Accounting for users' inflated assessments of on-line catalogue search performance and usefulness : an experimental study (2001)
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Spink, A.; Wilson, T.; Ellis, D.; Ford, N.: Modeling users' successive searches in digital environments : a National Science Foundation/British Library funded study (1998)
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