Drought analysis in the eastern plain of Henan province from 1956 to 2016
YANG Dan, LI Zhong-yuan, WANG Guo-zhong, LIU Shou-dong, LUO Qing-yuan, LI Jia-hong
HUBEI AGRICULTURAL SCIENCES . 2021, (9): 61 -65 .  DOI: 10.14088/j.cnki.issn0439-8114.2021.09.011