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Frank Springer

On a Trenton Echinoderm Fauna at Kirkfield, Ontario

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Frank Springer On a Trenton Echinoderm Fauna at Kirkfield, Ontario

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The Fossil Crinoid Genus Dolatocrinus And Its Allies: By Frank Springer

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Frank Springer The Fossil Crinoid Genus Dolatocrinus And Its Allies: By Frank Springer

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The North American Crinoidea Camerata; v.3

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Frank Springer The North American Crinoidea Camerata; v.3

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The Crinoidea Flexibilia (with An Atlas Of A.b.c. And 76 Plates)

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Frank Springer The Crinoidea Flexibilia (with An Atlas Of A.b.c. And 76 Plates)

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American Silurian Crinoids

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Frank Springer American Silurian Crinoids

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