The DRS mode of Jinan Library has experienced email, network form, and participation into the Collaborative Digital Reference Services Network of Sun Yat-sen Library of Guangdong Province.
济南市图书馆的数字参考咨询服务经历了从电子邮件、网络表单到加入广东省立中山图书馆联合参考咨询服务网的服务方式。
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