| References |
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| ˇ | Virtual
Reference Desk |
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| (conferences
proceedings also online) |
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| l | http://www.vrd.org/ |
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| ˇ | Alliance
Library Ready Reference |
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| (used in
Sloan’s study, including data) |
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| l | http://www.alliancelibrarysystem.com/ |
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| Projects/ReadyRef/index.html |
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