On the nature of Polylopia /

Bibliographic Details
Main Author:	Yochelson, Ellis L. (Ellis Leon), 1928-2006
Format:	Government Document Book
Language:	English
Published:	Washington : U.S. Govt. Print. Off, 1968.
Series:	Geological Survey professional paper ; 593-F. Geological Survey professional paper. Contributions to paleontology.
Subjects:	Polylopia billingsi. Paleontology > Ordovician.

Description
Physical Description:	iii, 7 pages, 4 unnumbered pages : illustrations ; 29 cm.
Bibliography:	Bibliography: page 7.