BENTON GROUP Montana District. Cascade County. Minerals Yearbook 1945. Page 395. Operated by the Montana Leasing Co. Output was 4,774 tons of silver ore - - yielded 327 tons of zinc-lead concentrate.
WPA, "Benton Group" (1945). Minerals Yearbook, All. 74.
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Benton Group, Montana District, Cascade County, Montana Leasing Company, silver ore, zinc-lead