A Preliminary Investigation on the Dusty Days in Beijing over 1860—1898 A.D.
FEI Jie, ZHOU Jie, ZHANG Qing-yao, CHEN Hui-zhong
JOURNAL OF GLACIOLOGY AND GEOCRYOLOGY . 2004, (5): 535 -539 .  DOI: 10.7522/j.issn.1000-0240.2004.0086

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