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马程, 王晓玥, 张雅昕, 李双成
Emergy analysis of ecosystem services supply and flow in Beijing ecological conservation area
Cheng MA, Xiaoyue WANG, Yaxin ZHANG, Shuangcheng LI
地理学报 . 2017, (6): 974 -985 .  DOI: 10.11821/dlxb201706003