Climate change since the late Middle Pleistocene indicated by geochemical characteristics of major elements of Jing＇erwa section in Yangyuan Basin,Hebei Province
Ji Yunping, Yang Zhenjing, Zhao Hua, Wang Likang, Yang Jinsong, Dong Qiuyao
JOPC . 2016, (3): 487 -496 .  DOI: 10.7605/gdlxb.2016.03.034