Environmental Change around the Qingtu Lake since 9500 a BP
ZHAO Qiang, WANG Nai-ang, LI Xiu-mei, CHENG Hong-yi, LI Yu, LI Gang
JOURNAL OF GLACIOLOGY AND GEOCRYOLOGY . 2005, (3): 352 -359 .  DOI: 10.7522/j.issn.1000-0240.2005.0053