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5Published 1978“...The Society,...”
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9Published 1980“...Geological Society of America,...”
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15Published 2016“...Geological Society of America,...”
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16Published 2019“...Geological Society of America,...”
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18Published 1958“...State Historical Society of Wisconsin,...”
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20by Perrin, Richard W. E., 1909-1990“...State Historical Society of Wisconsin,...”
Published 1967
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