South Dakota mica deposits
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Open-File Report↗
Geology topics
M.P. Erickson
Publications and source records attributed to M.P. Erickson.
Hi-Peak tungsten mine, Kern County, California
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Open-File Report↗
South Dakota mica deposits
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Open-File Report↗
Maudina and Morning Star tungsten mines, Pinal County, Arizona
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Open-File Report↗