7Kuylenstiema J C I,Cambridge H,Cinderby S,et a1.Terrestrial ecosystem sensitivity to acidic deposition in developing countries[J].Water Air Soil Pollut,1995,85:2319—2324.
8Qin Guoying, Hnang Meiyuan. A study on rain acidification processes in the cities of China[J] .Water Air Soil Pollut,2001,130:163- 174.