TY - GEOGRAPHICAL RESEARCH A1 - Xu ZHOU, Jianshu LV T1 - Sources, distribution and ecological risk of soil heavy metals in Guangrao county, Shandong province Y1 - 2019-02-20 15:01:00.02 JF - GEOGRAPHICAL RESEARCH JO - GEOGRAPHICAL RESEARCH SP - 414 EP - 426 VL - 38 IS - 2 UR - {https://www.dlyj.ac.cn/EN/10.11821/dlyj020171151} N1 - 10.11821/dlyj020171151 ER -