A revision of the Ordovician bryozoan genera Batostoma, Anaphragma, and Amplexopora
By: by Richard S. Boardman.
Series: Smithsonian miscellaneous collections -- v. 140, no. 5; Publication -- 4426; Publication (Smithsonian Institution) -- 4426.
Publisher: Smithsonian Institution
Published: 1960
Place of publication: Washington
Language: eng
Number of pages: 28
Subjects: Trepostomata.; Bryozoa, Fossil
Other titles: Ordovician bryozoan
Notes: At head of title: Charles D. and Mary Vaux Walcott Research Fund.

"December 15, 1960."

Includes bibliographical references.