GEOGRAPHICAL RESEARCH ›› 1988, Vol. 7 ›› Issue (2): 94-102.doi: 10.11821/yj1988020012
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URL: http://www.dlyj.ac.cn/EN/10.11821/yj1988020012
http://www.dlyj.ac.cn/EN/Y1988/V7/I2/94
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