Authors
Xiaoqiu Le
National Science Library, the Chinese Academy of Sciences, Beijing, China
Chenyu Mao
National Science Library, the Chinese Academy of Sciences, Beijing, China
University of the Chinese Academy of Sciences, Beijing, China
Yuanbiao He
National Science Library, the Chinese Academy of Sciences, Beijing, China
Changlei Fu
National Science Library, the Chinese Academy of Sciences, Beijing, China
Liyuan Xu
National Science Library, the Chinese Academy of Sciences, Beijing, China