干旱区流域下游绿洲环境变化及其成因分析——以甘肃省河西地区石羊河流域下游民勤县为例
杨永春
THE ANALYSIS OF THE OASIS ENVIRONMENTAL CHANGE AND ITS REASON OF THE LOWER REACHES OF THE ARID REGION——A Case Study of Minqin County in the Lower Reaches of Shiyang River in Hexi Corridor, Gansu Province
YANG Yong-chun
人文地理
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2003, (4): 42
-47
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DOI: 10.13959/j.issn.1003-2398.2003.04.010
