Preliminary Report On the Paleontology of the Black Hills, Containing Descriptions of New Species of Fossils From the Potsdam, Jurassic, And Cretaceous Formations of the Black Hills of Dakota
Preliminary Report On the Paleontology of the Black Hills, Containing Descriptions of New Species of Fossils From the Potsdam, Jurassic, And Cretaceous Formations of the Black Hills of Dakota
Preliminary to his "Paleontology of the Black Hills," printed in the Survey's "Report on the geology and resources of the Black Hills... Washington, 1880."
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