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The Factors Influencing the Poplar Shelterbelt Degradation in the Bashang Plateau of Northwest Hebei Province
ZHENG Chunya, XU Zhongqi, MA Changming, SUN Shoujia, YAN Tengfei
Forest and Grassland Resources Research . 2018, (1): 9 -15 .  DOI: 10.13466/j.cnki.lyzygl.2018.01.002