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Hazard assessment of drought disasters in Beijing-Tianjin-Hebei region based on Copula for recent 60 years
LI Qian, WANG Ying, XU Ying-jun, YU Hai-yang, LONG Shuang, HUANG Jing-ling
Arid Land Geography . 2019, (6): 1310 -1321 .  DOI: 10.12118/j.issn.1000-6060.2019.06.09