"Plant and Insect Fossils From the Green River Eocene of Colorado"
"Plant and insect fossils from the Green River eocene of Colorado, by T. D. A. Cockerell"
"Plant and insect fossils from the Green River Eocene of Colorado"
"Plant and insect fossils from the Green River Eocene of Colorado"@en
"Plant and insect fossils from the Green River Eocene of Colorado : By T.D.A. Cockerell. No. 2556.-From the Proceedings of the United States National Museum Vol. 66, Art. 19, pp. 1-13, with pls. 1-2. [Umschlagtitel]"
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