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3. Effects of land fragmentation and returns to scale in the Chinese farming sector Authors: Guang H. Wan; Enjiang Cheng Applied Economics, Volume 33, Issue 2 February 2001 , pages 183 - 194 http://www.informaworld.com/smpp/213103373-82528337/content~db=all~content=a713758748
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晕死。。也不知怎么就设成了悬赏帖