TY - Journal of Ecology and Rural Environment A1 - LÜ Guo-xu, CHEN Yan-mei, ZOU Chang-xin, FENG Chao-yang, HAO Fang-fang T1 - Spatial Pattern and Driving Factors of Vegetation Degradation in Beijing-Tianjin-Hebei Y1 - 2017-05-25 JF - Journal of Ecology and Rural Environment JO - Journal of Ecology and Rural Environment SP - 417 EP - 425 VL - 33 IS - 5 UR - http://www.ere.ac.cn N1 - 10.11934/j.issn.1673-4831.2017.05.005 ER -