Mineral resource research and activities of the State Geological Survey, 1948-1949
Series: Illinois State Geological Survey. Circular -- no. 166; Circular (Illinois State Geological Survey) -- no. 166.; Circular (Illinois State Geological Survey) -- 166.
Published: 1950
Place of publication: Urbana
Language: eng
Number of pages: 181
Subjects: Mines and mineral resources; Industrial Research; Illinois State Geological Survey
Notes: "Reprinted from the Annual report of the Chief to the Director, Dept. of Registration and Education, for the fiscal year 1948-1949."