A BRIEF ANALYSIS ON 1 : 1,000,000 GEOMORPHIC MAP OF HENG YANG ( G & 49 ) SHEET IN CHINA ⅰ . The Features of Geomorphic Structure and The Process of Development
中国1:100万地貌图衡阳(G-49)幅简析&1.地貌结构特征及其发育过程