Multimedia fate model for hexachlorocyclohexane in Tianjin, China - Cao, Hongying.; Cao, Jun.; Coveney, Raymond M., Jr.; Hu, Jianying.; Li, Bengang.; Liu, Wenxin.; Qin, Baoping.; Shen, Weiran.; Sun, Ren.; Tao, Shu.; Wang, Xuejun.; Xu, Fuliu.