Further investigations of Illinois fire clays
By: by C. W. Parmelee and C. R. Schroyer
Contributors: Schroyer, C. R.
Series: Illinois State Geological Survey. Bulletin -- no. 38c; Bulletin (Illinois State Geological Survey) -- no. 38c.
Publisher: State Geological Survey
Published: 1921
Place of publication: Urbana
Language: eng
Number of pages: 149
Subjects: Fire-clay; Clay
Notes: Reprinted extract from Bulletin no. 38.

Bibliographical footnotes.