Illinois mineral production by counties, 1967
By: W.L. Busch
Contributors: Illinois State Geological Survey
Series: Mineral economics brief -- no. 24
Publisher: Illinois State Geological Survey
Published: 1969
Place of publication: Urbana, [Ill.]
Language: eng
Number of pages: 10
Subjects: Mines and mineral resources
Notes: Cover title.

"April 1969."-- Cover.