"A stratigraphic study of the mollusks of the Calvert and Choptank formations of southern Maryland"@en
"A Stratigraphic Study of the Mollusks of the Calvert and Choptank Formations of Southern Maryland. A dissertation, etc. [With a chart.]"@en
"A stratigraphic study of the mollusks of the Calvert and Choptank formations of southern Maryland : Adiisertation presented to the Faculty of the Graduate School of Bryn Mawr College in partial fulfillment of the requirements for the Degree of Doctor of Philosophy"
"A stratigraphic study of the mollusks of the Calvert and Choptank Formations of southern Maryland"
"A stratigraphic study of the mollusks of the Calvert and Choptank formations of Southern Maryland"
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