Short papers on geologic subjects
Subtitle: Areal geology of part of central eastern Illinois
By: by Howard R. Schwalb. Prospecting for commercial sand and gravel using electrical earth resistivity, Clinton County, Illinois, by Jerry S. Dobrovolny. Ceramic materials from magnesium-treated clays, by William D. Johns
Series: Illinois State Geological Survey. Circular -- no. 188; Circular (Illinois State Geological Survey) -- no. 188.
Published: 1954
Place of publication: Urbana, Ill
Language: eng
Number of pages: 168
Subjects: Geology; Sand; Gravel; Ceramic materials
Notes: "Reprinted from the Transactions of the Illinois State Academy of Science, vol. 46, pp. 142-146, 154-168, 1953."

Includes bibliographical references.