1. Huang, M.Y., H.Y. Xu, and G-C. Wang, 2005:Atmospheric Environment, China Meteorological Press, Beijing, 166pp
2. Isherwood, K. F., 2000:Notes on the Atmospheric Emissions of Ammonia and other Nitrogen Compounds in Agriculture and the Role of Fertilizers, UN/ECE Ammonia Working Group, Berne, Switzerland, 10
3. Neutralization of soil aerosol and its impact on the distribution of acid rain over east Asia: Observations and model results