Polycyclic aromatic hydrocarbons and organochlorine pesticides in surface soils from the Qinghai-Tibetan plateau - Tao, Shu; Wang, Wentao; Liu, Wenxin; Zuo, Qian; Wang, Xilong; Wang, Rong; Bin Wang; Shen, Guofeng; Yang, Yuanhe; He, Jin-Shen (Journal of Environmental Monitoring, 2011)