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Purcell, R.: Computers and reference service (1989)
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Singh, S.: Ranganathan and reference services (1992)
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Isaacson, D.: Pleasures and pitfalls that can make or break a reference encounter (1998)
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Moore, B.J.: From reference class to reference desk : one year later (1998)
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Edwin, A.; Fleming, D.: Reference and information services (1992)
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