Mineral resources and mineral industries of the northwestern Illinois region
By: [by] Robert L. Major.
Series: Illinois. State Geological Survey. Mineral economics brief 20
Publisher: Dept. of Registration and Education
Published: 1967
Place of publication: Urbana, Ill
Language: eng
Number of pages: 25
Subjects: Mineral industries -- Illinois.
Notes: Bibliography: p. [24]-25.
Cover title.