Change Characteristics of Fog and Haze Days in Hebei Province from 1960 to 2013
吴雁1,王荣英1,李江波2,王霞1,刘晓峰1
Journal of Arid Meteorology . 2017, (3): 391 .  DOI: 10.11755/j.issn.1006-7639(2017)-03-0391