Two new crinoids from the Devonian of Michigan /

Bibliographic Details
Main Author: Ehlers, George Marion, 1891-
Format: Book
Language:English
Published: Ann Arbor : University of Michigan, [1925]
Series:Contributions from the Museum of Paleontology ; v. 2, no. 6.
Subjects:
Description
Item Description:Cover title.
Physical Description:99-104 pages ; pl.