Digital reference service (DRS) has become the integral part of the second generation digital library.
数字参考咨询已成为第二代数字图书馆不可缺少的一部分。
Digital reference service system is the core content of library construction under network environment.
数字参考咨询服务系统是网络环境下图书馆建设的核心内容。
Digital reference service system is the core content of library construction under network environment.
数字参考咨询服务系统是网络环境下图书馆建设的核心内容。
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