1. Energy Information Administration. Electric Power Annual 1995: Volume II. Energy Information Administration report DOE/EIA-0348 (95)/2, 1996.
2. Energy Information Administration. The effects of Title IV of the Clean Air Act Amendments of 1990 on electric utilities: An update. http://www.eia.doe.gov/cneaf/electicity/clean_air_up97/exec_sum.html, 1997.
3. Hower JC, Robl TL, Thomas GA. International Journal of Coal Geology, 1999, in press.
4. Rose JG, Lowe JA, Floyd RK. Fifth International Ash Utilization Symposium, Atlanta, GA, 1979:25–27.