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["<p> Pamphlet.  "Effective August 1, 1920, expiring March 31, 1922."</p>"]
["<p> Government document. At head of title: Department of the Interior, United States Geological Survey, J.W. Powell, Director. "Abstract from <em>Mineral Resources of the United States, Calendar Years 1883 and 1884, Albert Williams, Jr., Chief of Division of Mining Statistics</em>".<br /> <br />  </p>"]