Preparation characteristics of Illinois coals
By: William L. Crentz.
Series: Technical paper (United States. Bureau of Mines) ;; 724
Publisher: U.S. Govt. Print. Off.
Published: 1949
Place of publication: Washington
Language: eng
Number of pages: 112
Subjects: Coal -- Illinois.; Coal preparation.
Notes: Includes bibliographical references.
At head of title: United States Dept. of the Interior, J.A. Krug, Secretary; Bureau of Mines, James Boyd, director.