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Louis Agassiz (American, 1807 – 1873)
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Geoffrey Holt (American, 20th Century)
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Louis Agassiz (American, 1807 – 1873)
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Alex Jones (American, 19th/20th century)
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Udo Keppler (American, 1872 – 1956)
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Alfred Rudolph Waud (American, 1828 - 1891)
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