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  1. Robertson, S.E.; Thompson, C.L.: ¬An operational evaluation of weighting, ranking and relevance feedback via a front-end system (1987) 5.50 
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  2. Cuadra, C.A.; Katter, R.V.: Experimental studies of relevance judgements: final report : Vol.2: description of individual studies (1967) 5.50 
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  3. Hancock-Beaulieu, M.; McKenzie, L.; Irving, A.: Evaluative protocols for searching behaviour in online library catalogues (1991) 5.50 
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  4. Armstrong, C.J.; Medawar, K.: Investigation into the quality of databases in general use in the UK (1996) 5.50 
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  5. Aitchison, T.M.: Comparative evaluation of index languages : Part I, Design. Part II, Results (1969) 5.50 
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