here - State of Arizona Department of Mines and Mineral Resources
here - State of Arizona Department of Mines and Mineral Resources
here - State of Arizona Department of Mines and Mineral Resources
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Principal<br />
Gold-Producing Districts<br />
<strong>of</strong> the United <strong>State</strong>s<br />
By A. H. KOSCHMANN <strong>and</strong> M. H. BERGENDAHL<br />
GEOLOGICAL SURVEY PROFESSIONAL PAPER 610<br />
A description <strong>of</strong> the geology, mining history,<br />
<strong>and</strong> production <strong>of</strong> the major gold-mining<br />
districts in21 <strong>State</strong>s<br />
UNITED STATES GOVERNMENT PRINTING OFFICE, WASHINGTON 1968
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