A revision of A. W. Grabau's species of Mucrospirifer from the Middle Devonian traverse group of Michigan.

Bibliographic Details
Main Author:	Stumm, Erwin Charles, 1908-1969
Format:	Book
Language:	English
Published:	Ann Arbor : Museum of Paleontology, University of Michigan, 1956.
Series:	Contributions from the Museum of Paleontology ; v. 13, no. 3.
Subjects:	Grabau, Amadeus W. > (Amadeus William), > 1870-1946. Mucrospirifer. Paleontology > Michigan. Paleontology > Devonian.

Description
Item Description:	"From the Ermine Cowles Case memorial volume."
Physical Description:	81-94 pages : 3 plates.
Bibliography:	Bibliography: page 90.