Mineral resource research and activities of the State Geological Survey, 1950-1951
By: by M.M. Leighton
Series: Illinois State Geological Survey. Circular -- no. 175; Circular (Illinois State Geological Survey) -- no. 175.; Circular (Illinois State Geological Survey) -- 175.
Published: 1951
Place of publication: Urbana
Language: eng
Number of pages: 38
Subjects: Mines and mineral resources; Geological surveys
Notes: "Preprinted from the annual report of the Chief to the Director, Dept. of Registration and Education, for fiscal year 1950-1951."