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- author's%3a%22Liu%2c S.%22 2
- authors%3a%22Liu%2c S.%22 2
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Allen, E.E.: Searching, naturally (1998)
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- Internet reference services quarterly. 3(1998) no.2, S.75-81
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Cheng, K.-H.: Automatic identification for topics of electronic documents (1997)
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- Source
- Bulletin of the Library Association of China. 1997, no.59, Dec., S.43-58