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Head, M.C.; Marcella, R.: ¬A testing question : the quality of reference services in Scottish public libraries (1993)
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Payne, C.: ¬The use of public reference libraries (1990)
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Assessment and accountability in reference work (1992)
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Hults, P.: Reference evaluation : an overview (1992)
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Packer, K.H.; Michaud, J.M.: ¬The use and users of COM catalogues at the University of Toronto and the Mississauga Library System (1983)
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