敦煌绿洲地下水微量元素分布特征及其成因

何建华, 秦文华, 郭嘉兵, 陈沛源, 马金珠

The characteristics of groundwater trace elements and its controlling factors in Dunhuang Oasis

Jianhua He, Wenhua Qin, Jiabing Guo, Peiyuan Chen, Jinzhu Ma

图3 聚类群组树状分类图

Fig.3 Dendrogram of cluster analysis