1. “Chemical Desulfurization of Coal,” IEA Coal Research, TIS report (June, 1981).
2. “Coal Desulfurization,” Marcel-Dekker Inc., N.Y. (1977).
3. , , “Assessment of Coal Cleaning Technology: An Evaluation of Chemical Coal Cleaning Processes,” PB 289 493, US EPA; Washington, D.C. (1978).
4. ACS Sym. Ser.;Wheelock,1977