海量图书期刊资源，随时随地畅享阅读乐趣
Characteristics of annual laminae gray level variations in a stalagmite from Shihua Cave, Beijing and its climatic significance (II)Xiaoguang Qin; Ming Tan; Dongsheng Liu; Tungsheng Liu; Xianfeng Wang; Tieying Li; Jinpo Lü · 2000