Knox and Yingling fluorite mines, Hardin County, Ill.

Author: Burmeister, Harry Louis.
Year: 1952
Document Type: BMRA
Issuing Agency: United States Department of the Interior, Bureau of Mines,
SUDOC: I 28.23:4856
Series: Report of investigations / United States Department of the Interior, Bureau of Mines ;
Report Number: 4856
Subject: Fluorite mines and mining--Illinois--Hardin County
Link: https://hdl.handle.net/2027/mdp.39015078483883

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