A Study on the Availabilities of Vertical Portals and Their Information Service Modes

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Library and Information Service ›› 2001, Vol. 45 ›› Issue (1) : 48-49,27.

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{{article.zuoZheEn_L}}. {{article.title_en}}[J]. {{journal.qiKanMingCheng_EN}}, 2001, 45(1): 48-49,27

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