1. Evaluation of Coal-Gasification Technology;Chilton;Pipeline-Quality Gas, R & D Report No. 74-Interim Report No.1,1973
2. New Energy Technology — Some Facts and Assessments;Hottel,1971
3. Fuel Gasification;Gasior,1967
4. Bureau of Mines Synthane Process: Research and Development on Converting Coal to Substitute Natural Gas;Corey,1972