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- author's%3a%22Liu%2c S.%22 2
- authors%3a%22Liu%2c S.%22 2
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Janes, J.: Digital reference : reference librarians' experiences and attitudes (2002)
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- Journal of the American Society for Information Science and technology. 53(2002) no.7, S.549-566
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Janes, J.; Hill, C.; Rolfe, A.: Ask-an-expert services analysis (2001)
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- Journal of the American Society for Information Science and technology. 52(2001) no.13, S.1106-1121