Chlorofluorocarbons, hydrochlorofluorocarbons, and hydrofluorocarbons in the atmosphere of four Chinese cities - Jing Wu; Xuekun Fang; Wanyun Xu; Dan Wan; Yehong Shi; Shenshen Su; Hu, Jianxin; Jianbo Zhang (Atmospheric EnvironmentAtmospheric Environment, 2013)