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1 .中国地质图书馆——数字资源简介——外文开放获取期刊
… knowledge to an international audience. Thus, the Bulletin in electronic form is free to individuals and institutions. Downloaded copies of this journal or articles in this journal may be distributed for research or educational purposes without charge, pr …
http://cgl.org.cn/zy/wwkf.aspx   2013-08-24
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