TY - Journal of Ecology and Rural Environment A1 - XU Lei, XIAO Xin, MA Yu, HAN Xiao-xuan T1 - Sources and Spatial Distributions of Heavy metals in Xuzhou Farmland Soils Y1 - JF - Journal of Ecology and Rural Environment JO - Journal of Ecology and Rural Environment SP - 1453 EP - 1459 VL - 35 IS - 11 UR - http://www.ere.ac.cn N1 - 10.19741/j.issn.1673-4831.2019.0240 ER -