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DOI：10.3969/j.issn.1004-874X.2010.06.105
Author NameAffiliation
范晓燕, 李科林, 孙根年 中南林业科技大学林学院,湖南,长沙,410004
陕西师范大学旅游与环境学院,陕西,西安,710062 
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