GIS方法和USLE模型在退耕还林区土壤侵蚀动态变化评价中的运用——以甘肃定西市安定区为例
GIS방법화USLE모형재퇴경환림구토양침식동태변화평개중적운용——이감숙정서시안정구위례
Application of GIS and USLE in Evaluation of Dynanic Changes of Dynamic Changes of Soil Erosion in Areas of Returning Farmland to Forest - A Case Study in Anding District, Dingxi City, Gansu Province
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