Specific gravity studies of Illinois coal
By: by Merle L. Nebel.
Series: Engineering Experiment Station. Bulletin; no. 89; University of Illinois bulletin.; v. 13, no. 44
Publisher: The University of Illinois
Published: 1916
Place of publication: Urbana, Ill
Language: eng
Number of pages: 49
Subjects: Coal -- Illinois.
Notes: Cover title.