Study on Population Structure and Spatial Distribution Characteristics of Pinus tabulaeformis in the Forest Region of the Helan Mountains in Inner Mongolia

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YANG Yuewen, DUAN Yuxi, JI Meng, ZENG Yu, LI Yinxiang, REN Jianmin, ZHOU Xingqiang, ZHANG Fenghe

Forest and Grassland Resources Research . 2014, (2): 87 -92 . DOI: 10.13466/j.cnki.lyzygl.2014.02.016