CALLAHAN GROUP (Deer Horn) Willow Creek District. Jefferson County. Minerals Yearbook 1941. Page 379. Some ore shipped crude to smelter; some amalgamated and concentrated. (Lead-Gold ore).
WPA, "Callahan Group (Deer Horn)" (1941). Minerals Yearbook, All. 150.
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Callahan Group, Deer Horn, Willow Creek District, lead, gold, ore, amalgamated, concentrated