TY - Journal of Yangtze River Scientific Research Institute A1 - XIE Ren-dong, ZHAO Cui-wei T1 - Spatio-temporal Differentiation of Ecological Environment Vulnerability in Karst Trough Region Based on Grid Scale Y1 - 2018-04-01 JF - Journal of Yangtze River Scientific Research Institute JO - Journal of Yangtze River Scientific Research Institute SP - 48 EP - 53 VL - 35 IS - 4 UR - http://ckyyb.crsri.cn N1 - 10.11988/ckyyb.20171227 ER -