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1
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2Published 1985Subjects: “...Glacial epoch Illinois....”
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9by Ball, Robert S. (Robert Stawell), 1840-1913Subjects: “...Glacial epoch....”
Published 1891
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14by Calhoun, F. H. H. (Fred Harvey Hall), 1873-1959Subjects: “...Glacial epoch....”
Published 1906
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15by Frye, John C., (John Chapman), 1912-1982Subjects: “...Glacial epoch Wisconsin....”
Published 1960
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17by Epstein, Jack Burton, 1935-Subjects: “...Glacial epoch Pennsylvania Northampton County....”
Published 1969
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19by Wright, G. Frederick (George Frederick), 1838-1921Subjects: “...Glacial epoch....”
Published 1911
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20by Willman, H. B. (Harold Bowen), 1901-1955Subjects: “...Glacial epoch Illinois....”
Published 1980
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