LIU Jing-jun, LAI Zi-juan, DENG Feng-yu, ZHOU Shan-shan, ZHANG Li-yang, LIU Ying. Heavy Metals Contents and Speciation in Surface Sediments from Gansu, Ningxia and Inner Mongolia Sections of the Yellow River of China[J]. Spectroscopy and Spectral Analysis, 2015, 35(10): 2963