FLATHEAD PROPERTY Hog Heaven District. Flathead County. Minerals Yearbook 1936. Pages 104, 213. Third of the producers accounting for 89 per cent of the total silver produced in 1935. Also a large producer of copper.
WPA, "Flathead Property" (1936). Minerals Yearbook, All. 479.
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Flathead Property, Hog Heaven District, Flathead County, silver, copper