Herbaceous diversity and the relationship with terrain in forest communities in northern Hebei mountain
CAO Yunsheng, YANG Xinbing, ZHANG Wei, SONG Qingfeng, ZHANG Jianhua
Ecology and Environment . 2010, (12): 2840 -2844 .  DOI: 10.16258/j.cnki.1674-5906(2010)12-2840-05

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