[1]常庆瑞.乾县枣子沟流域土地类型研究[J].水土保持研究,1989,(01):36-42.
 Chang Qingrui.A Study of Land Types in Zaozigou Watershed Qianxian County, Shaanxi Province[J].Research of Soil and Water Conservation,1989,(01):36-42.
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乾县枣子沟流域土地类型研究

更新日期/Last Update: 1900-01-01