Mineral matter in coal
By: by George C. Sprunk and H. J. O'Donnell.
Contributors: O'Donnell, Hugh J., 1910- joint author.
Series: United States. Bureau of mines. Technical paper 648
Publisher: U.S. Govt. print. off.
Published: 1942
Place of publication: Washington
Language: eng
Number of pages: 67
Subjects: Coal -- Analysis; Mineralogy
Notes: At head of title: United States Dept. of the interior, Harold L. Ickes, secretary. Bureau of mines, R. R. Sayers, director ...