Lower Triassic ammonoids of North America
By: by James Perrin Smith.
Series: Geological Survey (U.S.). Geological Survey professional paper ;; no. 167; Geological Survey professional paper ;; no. 167.
Publisher: U.S. Gov't. Print. Off.
Published: 1932
Place of publication: Washington
Language: eng
Number of pages: 199
Subjects: Ammonoidea.; Paleontology -- North America.; Paleontology -- Triassic.
Notes: Bibliography: p. 4-6.
At head of title: United States Department of the Interior.