Mineral production in Illinois in 1968

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https://hdl.handle.net/2142/96134

Title: Mineral production in Illinois in 1968
Issue Date: 1969
Keyword(s): Mines and mineral resources - Illinois
Publisher: Champaign, Ill.: Illinois State Geological Survey, Prairie Research Institute.
Series/Report Name or Number: Circular no. 447
Type of Resource: text
Language: en
Permalink: http://hdl.handle.net/2142/96134
Copyright and License Information: Copyright 1969 University of Illinois Board of Trustees