月球哥白尼纪次级坑的形态特征及其空间分布
张珂, 刘建忠, 程维明

Morphological features and spatial distribution of the lunar Copernican secondary craters
Ke ZHANG, Jianzhong LIU, Weiming CHENG
图1 哥白尼纪5个典型撞击坑的空间位置及其次级坑分布界限范围
Fig.1 Spatial locations of the five Copernican lunar primary craters and the maximum distribution range of their secondary craters