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Sedimentary Record of Climate Change During the Past 25.5 ka  of Laohetou Profile from Baiyangdian,Hebei Province
YANG Hui-jun, WANG Yong, CHI Zhen-qing, YAO Pei-yi, DONG Jin, TIAN Ming-z
Geoscience . 2015, (2): 291 -298 .