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  2. 2
    Published in Science (1904)
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    by Jagnaux, Raoul
    Published in Science (1885)
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    E-Article
  4. 4
    Published in The Journal of Geology (1955)
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    E-Article
  5. 5
    Published in The Journal of Geology (1950)
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  6. 6
    Published in The Journal of Geology (1929)
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  7. 7
    by Ruska, Julius
    Published in Isis (1913)
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    E-Article
  8. 8
    Published in The American Naturalist (1891)
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    E-Article
  9. 9
    Published in The American Naturalist (1890)
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  10. 10
    by Kunz, George F.
    Published in Science (1923)
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  12. 12
    by Rüger, L.
    Published in Geographische Zeitschrift (1934)
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    E-Article
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  16. 16
    by Evans, Howard T.
    Published in Science (1954)
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