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1by Chase, Edith B.“...U.S. Geological Survey circular ;...”
Published 1983
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2
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3“...Geological Survey circular ;...”
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4“...Geological Survey circular ;...”
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5by Foster, Helen Laura, 1919-“...Geological Survey circular ;...”
Published 1976
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6Published 1976“...Geological Survey circular ;...”
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7“...Geological Survey circular ;...”
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8Published 1976“...Geological Survey circular ;...”
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9
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10“...Geological Survey circular ;...”
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11“...Geological Survey circular ;...”
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12“...Geological Survey circular ;...”
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13“...Geological Survey circular ;...”
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14Published 1976“...Geological Survey circular ;...”
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15“...Geological Survey circular ;...”
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16by Danenberger, Elmer P.“...Geological Survey circular ;...”
Published 1976
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17Published 1976“...Geological Survey circular ;...”
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18by MacKevett, E. M. (Edward Malcolm), 1918-2006“...Geological Survey circular ;...”
Published 1977
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19“...Geological Survey circular ;...”
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20Published 1974“...Geological Survey circular ;...”
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