Tests on clay materials available in Illinois coal mines
By: by R.T. Stull and R.K. Hursh
Contributors: Hursh, Ralph K. (Ralph Kent), 1885-; Illinois State Geological Survey; University of Illinois (Urbana-Champaign campus). Engineering Experiment Station; United States. Bureau of Mines
Series: Cooperative mining series. Bulletin 18
Publisher: Illinois State Geological Survey, University of Illinois
Published: 1917
Place of publication: Urbana
Language: eng
Number of pages: 130
Subjects: Coal mines and mining; Clay
Notes: At head of title: State of Illinois. State Geological Survey. Frank W. DeWolf, chief.

Prepared under a cooperative agreement between the Illinois State Geological Survey, the Engineering Experiment Station of the University of Illinois, and the U.S. Bureau of Mines.