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Evidence of a humid mid- Holocene in the western part of Chinese Loess Plateau[J]. AN Chengbang1, FENG Zhaodong1 & TANG Lingyu2 1. National Laboratory of Western Chinas Environmental Systems, Ministry of Education, Lanzhou University, Lanzhou 730000, China;2. Nanjing Institute of Geology and Paleontology, Chinese Academy of Sciences, Nanjing 210008, China Correspondence should be addressed to An Chengbang (e-mail: cban@ lzu.edu.cn).Chinese Science Bulletin. 2003(22)