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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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Hodges, S.; Cooke, M.; Medows, J.: Public libraries and the question about the environment (1993)
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Etter, Z.: Using reference questions to analyze collections and services (1995)
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Head, M.C.; Marcella, R.; Smith, J.M.: Are you being served? : The quality of business information provision in Scottish public libraries (1995)
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