Directory of Illinois mineral producers
By: W.L. Busch
Contributors: Illinois State Geological Survey
Series: Mineral economics brief -- 23
Publisher: Illinois State Geological Survey
Published: 1968
Place of publication: Urbana [Ill.]
Language: eng
Number of pages: 10
Subjects: Mineral industries; Directories
Notes: Cover title.

At head of title: State of Illinois, Department of Registration and Education.

"July 1968."