Characteristics and Sources Apportionment of Ambient Volatile Organic Compounds (VOCs) in Summer in Shuozhou - Rumei, Li; Yuanyuan, Wu; Lin, Peng; Qinglan, Ma; Yinghui, Li; Haijing, Wang; Ling, Mu; Yulong, Yan; Huiling, Bai (Environmental Chemistry, 2017)