TY - JOURNAL OF NATURAL RESOURCES A1 - MA Rong, ZHANG Ming-jun, WANG Sheng-jie, WANG Jie, YANG Sen, CHEN Rong T1 - Variation Characteristics of Snow Cover Days in Winter in Arid Region of Northwest China in Last 50 Years Y1 - 2018-01-20 00:00:00.0 JF - JOURNAL OF NATURAL RESOURCES JO - JOURNAL OF NATURAL RESOURCES SP - 127 EP - 138 VL - 33 IS - 1 UR - {https://www.jnr.ac.cn/EN/10.11849/zrzyxb.20161261} N1 - 10.11849/zrzyxb.20161261 ER -