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DOI：10.3969/j.issn.1004-874X.2010.09.106
Author NameAffiliation
刘东华, 杨少海 广东外语外贸大学财经学院,广东,广州,510420
广东省农科院土壤肥料研究所,广东,广州,501640
国家行政学院,北京,100089 
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