EN中文
THE DYNAMIC CHANGES OF THE GRAVITY CENTER OF THE FARMLAND AREA AND THE QUALITY OF THE FARMLAND ECOLOGICAL BACKGROUND IN CHINA
GAO Zhiqiang, LIU Jiyuan, ZHUANG Dafang
JOURNAL OF NATURAL RESOURCES . 1998, (1): 92 -96 .  DOI: 10.11849/zrzyxb.1998.01.017