Winchell A. (1863). Descriptions of fossils from the yellow sandstones lying beneath the "Burlington Limestone" at Burlington, Iowa. Proceedings of the Academy of Natural Sciences of Philadelphia. 15: 2-25.
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Winchell A.
1863
Descriptions of fossils from the yellow sandstones lying beneath the "Burlington Limestone" at Burlington, Iowa
Proceedings of the Academy of Natural Sciences of Philadelphia