Silicified Middle Ordovician trilobites
By: by H.B. Whittington and W.R. Evitt, II
Contributors: Evitt, William R., author
Series: Geological Society of America. Memoir -- 59; Memoir (Geological Society of America) -- 59.
Publisher: Geological Society of America
Published: 1954
Place of publication: [New York]
Language: eng
Number of pages: 137
Subjects: Trilobites; Paleontology; Ordovician Geologic Period
Notes: Imprint date covered by label: January 20, 1954.

Includes bibliographical references (pages 97-100).