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1by Page, Robert A.“...Fact sheet (Geological Survey (U.S.)) ;...”
Published 1999
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2by Nolan, Bernard T., 1954-“...Fact sheet (Geological Survey (U.S.)) ;...”
Published 1997
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3Published 1999“...Fact sheet (Geological Survey (U.S.)) ;...”
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4by Finkelman, Robert B. (Robert Barry)“...Fact sheet (Geological Survey (U.S.)) ;...”
Published 2000
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5Published 2000“...Fact sheet (Geological Survey (U.S.)) ;...”
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6Published 2001“...Fact sheet (Geological Survey (U.S.)) ;...”
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7Published 2001“...Fact sheet (Geological Survey (U.S.)) ;...”
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8by Zogorski, John S.“...Fact sheet (Geological Survey (U.S.)) ;...”
Published 2001
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9Published 2003“...Fact sheet (Geological Survey (U.S.)) ;...”
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10Published 2003“...Fact sheet (Geological Survey (U.S.)) ;...”
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11Published 1996“...Fact sheet (Geological Survey (U.S.)) ;...”
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12by Preston, Stephen D., 1955-“...Fact sheet (Geological Survey (U.S.)) ;...”
Published 1996
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13by Williams, John H. (John Herbert), 1954-“...Fact sheet (Geological Survey (U.S.)) ;...”
Published 1998
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14Published 1996“...Fact sheet (Geological Survey (U.S.)) ;...”
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15Published 1997“...Fact sheet (Geological Survey (U.S.)) ;...”
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16Published 1997“...Fact sheet (Geological Survey (U.S.)) ;...”
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17Published 1997“...Fact sheet (Geological Survey (U.S.)) ;...”
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18Published 1996“...Fact sheet (Geological Survey (U.S.)) ;...”
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19by Teller, Ralph W.“...Fact sheet (Geological Survey (U.S.)) ;...”
Published 1998
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20Published 1997“...Fact sheet (Geological Survey (U.S.)) ;...”
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