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Mendelsohn, J.: Perspectives on quality of reference service in an academic library : a qualitative study (1997)
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Park, J.-r.; Li, G.; Burger, A.: Opening and closing rituals of the virtual reference service of the Internet Public Library (2010)
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Solimine, G.: Qualita totale e qualita del colloquio (1993)
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Bicknell, T.: Focusing on quality reference service (1994)
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Revelli, C.: ¬Le informazioni in biblioteca (1997)
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