TY - Acta Geographica Sinica A1 - Yanfang CHEN, Jianhua MA, Dexin LIU, Lei GU T1 - Heavy metal enrichment and pollution of historical cultural layers in Kaifeng City, Henan Province Y1 - 2017-05-20 00:00:00.0 JF - Acta Geographica Sinica JO - Acta Geographica Sinica SP - 892 EP - 905 VL - 72 IS - 5 UR - {https://www.geog.com.cn/EN/10.11821/dlxb201705010} N1 - 10.11821/dlxb201705010 ER -