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<dl><dd>"September 1989."</dd>
<dd>"A technical document supporting the 1989 USDA Forest Service RPA Assessment."--Cover</dd>
<dd>Includes bibliographical references (p. 36-38)</dd></dl><br>Subjects: Mines and mineral resources United States; Mines and mineral resources Economic aspects United States; Mineral resources conservation United States; Forests and forestry United States</div>
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Rocky Mountain Forest and Range Experiment Station (Fort Collins, Colo.)</div>
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