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Pernat, M.: Developing a reference telephone inquiries service (1994)
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Herman, D.: But does it work? : evaluating the Brandeis reference model (1994)
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Quinn, B.: Improving the quality of telephone reference services (1995)
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Allen, F.R.; Smith, R.H.: ¬A survey of telephone enquiries : case study and operational impact in an academic library reference department (1993)
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Smith, D.R.: Collection development for telephone reference (1993)
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