sponsored by ASTM Committee D-5 on Coal and Coke, American Society for Testing and Materials, Ottawa, Ontario, Canada, 22-23 Sept. 1976 ; R. R. Dutcher, editorThe Societyc1978
sponsored by ASTM Committee D-5 on Coal and Coke, American Society for Testing and Materials, Ottawa, Ontario, Canada, 22-23 Sept. 1976, R. R. Dutcher, editor1978