文章摘要
  
DOI：10.3969/j.issn.1004-874X.2009.01.046
Author NameAffiliation
李向伟, 商春荣, 左两军 广东省农科院科技情报研究所,广东,广州,510640
华南农业大学经济管理学院,广东,广州,510642 
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