SHI Hui lan, WANG Qi ji *,JING Zeng chun, LI Shi xiong, WANG Jie . Community Succession and Species Diversity of Manmade Pratum as Well as Degenerated Pratum on ‘Heitutan land’(Secondary Bare Land) in the Area Covered by the Headwaters of Yellow River and Yangtze River[J]. Acta Botanica Boreali-Occidentalia Sinica,2005,25(4):
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