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Bunge, C.A.: Evaluating reference services and reference personnel : questions and answers from the literature (1994)
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Smith, L.C.: Reference services (2009)
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Dickstein, R.; Greenfield, L.; Rosen, J.: Using the World Wide Web at the reference desk (1997)
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Powell, R.R.; Raber, D.: Education for reference/information service : a quantitative and qualitiative analysis of basic reference courses (1994)
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Hults, P.: Reference evaluation : an overview (1992)
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