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H. Doc. 59-198 - Geology of the Tonopah mining district, Nevada, by Josiah Edward Spurr. [U.S. Geological Survey Professional Paper No. 42. Series A, Economic geology, 56. Series B, Descriptive geology, 65.]

Geology of the Tonopah mining district, Nevada, by Josiah Edward Spurr. [U.S. Geological Survey Professional Paper No. 42. Series A, Economic geology, 56. Series B, Descriptive geology, 65.]
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