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Coffman, S.: Going live : starting and running a virtual reference service (2003)
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Barry, E.; Bedoya, J.K.; Groom, C.; Patterson, L.: Virtual reference in UK academic libraries : the virtual enquiry project 2008-2009 (2010)
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Matson, M.: Missouri Statewide Reference Center (1992)
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Godfrey, K.: ¬A new world for virtual reference (2008)
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Shachaf, P.; Oltmann, S.M.; Horowitz, S.M.: Service equality in virtual reference (2008)
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