Relationship between Shrubs Distribution and Slope: A Case Study in Mountains of the Beijing-Tianjin-Hebei Region
WANG Tao;HAO Qian;LIU Hongyan
北京大学学报（自然科学版） . 2015, (4): 685 -693 .  DOI: 10.13209/j.0479-8023.2015.091

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