Some Upper Cretaceous shells of the rudistid group from Tamaulipas, Mexico,

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Bibliographic Details
Main Author: Stephenson, Lloyd William, 1876-
Format: Book
Language:English
Published: Washington, Govt. Print. Off., 1922.
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Description
Item Description:Cover-title.
"From the proceedings of the United States National Museum, vol. 61, art 1, pp. 1-28, pls. 1-15."
Physical Description:28 p. 15 plates on 8 ℓ. 25 cm.