1. The gasification of coal chars in a fluidized-bed ash agglomeration gasifier;Sandstrom,1976
2. Low-Btu-gas from the IGT ash-agglomeration gasification process;Rehmat,1978
3. U-GAS® technology status;Patel,1979
4. Standard Method of Preparing Coal Samples for Microscopical Analysis by Reflected Light. American Society for Testing and Materials, Philadelphia, D2797-72.
5. Comprehensive analysis of coal ash and silicate rocks by atomic-absorption spectrophotometry by a fusion technique;Boar;Analyst (London),1970