Watson, J. G., Chow, J. C., Chen, L.-W.A. (2004). Summary of methods and comparison studies for organic and elemental carbon: Implications for visibility and global warmingSummary of methods and comparison studies for organic and elemental carbon: Implications for visibility and global warming, In Proceedings, Regional and Global Perspectives on Haze: Causes, Consequences and Controversies, Visibility Specialty Conference, 55-1-55-38, Air and Waste Management Association: Pittsburgh, PA