Conrad, T. A. (1865). Catalogue of the Eocene Annulata, Foraminifera, Echinodermata, and Cirripedia of the United States. Proceedings of the Academy of Natural Sciences of Philadelphia. 17: 73-75.
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Conrad, T. A.
1865
Catalogue of the Eocene Annulata, Foraminifera, Echinodermata, and Cirripedia of the United States
Proceedings of the Academy of Natural Sciences of Philadelphia