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Author: Morton, Samuel George, 1799-1851.
Published 1844
Record Source: Published Materials
“...Pennsylvania Philadelphia Geologists Biography....”
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2
Published 1888
Record Source: Published Materials
“...Pennsylvania Philadelphia Geologists Biography....”
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3
Published 1851
Record Source: Published Materials
“...Pennsylvania Philadelphia Geologists Biography....”
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4
Author: Frazer, Persifor, 1844-1909.
Published 1892
Record Source: Published Materials
“...Pennsylvania Philadelphia Geologists Biography....”
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Author: Frazer, Persifor, 1844-1909.
Published 1903
Record Source: Published Materials
“...Pennsylvania Philadelphia Geologists Biography....”
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6
Published 1889
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“...Pennsylvania Philadelphia Geologists Biography....”
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7
Author: Upham, Warren, 1850-1934.
Published 1888
Record Source: Published Materials
“...Pennsylvania Philadelphia Geologists Biography....”
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8
Author: Lyman, Benjamin Smith, 1835-1920.
Published 1903
Record Source: Published Materials
“...Pennsylvania Philadelphia Geologists Biography....”
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9
Author: Chapman, Henry C. 1845-1909.
Published 1891
Record Source: Published Materials
“...Pennsylvania Philadelphia Geologists Biography....”
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10
Published 1851
Record Source: Published Materials
“...Pennsylvania Philadelphia Geologists Biography....”
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