ERMONT MINES, INC. Argenta District. Beaverhead County. Minerals Yearbook 1939. Page 373. Treated 31,583 tons of gold ore. Was chief producer in County. Output of gold decreased.
WPA, "Ermont Mines Inc." (1939). Minerals Yearbook, All. 401.
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Ermont, Argenta District, Beaverhead County, gold