GEOGRAPHICAL RESEARCH >
2002 , Vol. 21 >Issue 4: 528 - 533
DOI: https://doi.org/10.11821/yj2002040016
Online published: 2002-08-15
liu Wei-dong . [J]. GEOGRAPHICAL RESEARCH, 2002 , 21(4) : 528 -533 . DOI: 10.11821/yj2002040016
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