Adaptability research on the common meteorological drought indexes of SPEI and SPI in the northern Shaanxi province
LUO Man-ya, GENG Guang-po, ZHOU Hong-kui, ZHOU Xue
HUBEI AGRICULTURAL SCIENCES . 2020, (21): 42 -50 .  DOI: 10.14088/j.cnki.issn0439-8114.2020.21.010