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Surviving component of the Wilhelm Bock collection of fossils (invertebrates, vertebrates, and plants) held at the Academy of Natural Sciences of Philadelphia
Surviving component of the Wilhelm Bock collection of fossils (invertebrates, vertebrates, and plants) held at the Academy of Natural Sciences of PhiladelphiaEarle E. Spamer
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Earle E. Spamer
Surviving component of the Wilhelm Bock collection of fossils (invertebrates, vertebrates, and plants) held at the Academy of Natural Sciences of Philadelphia

Surviving component of the Wilhelm Bock collection of fossils (invertebrates, vertebrates, and plants) held at the Academy of Natural Sciences of Philadelphia

Earle E. Spamer
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