Sulfur reduction of Illinois coals--washability studies
By: [by] R. J. Helfinstine [and others]
Contributors: Helfinstine, Roy John.
Series: Its Circular 462, 484; Circular (Illinois State Geological Survey) ;; 462, etc.
Published: 1971
Place of publication: Urbana
Language: eng
Subjects: Coal washing.; Coal -- Sulphur content -- Illinois.
Notes: Bibliography: pt. 1, p. 25; pt. 2, p. 21.
Cover title.