Lower Triassic ammonoids of North America /

Bibliographic Details
Format:	Government Document Book
Language:	English
Published:	Washington : U.S. Gov't. Print. Off, 1932.
Series:	Geological Survey professional paper ; no. 167.
Subjects:	Ammonoidea. Paleontology > North America. Paleontology > Triassic. Ammonieten (weekdieren) Trias.

Evans: US Documents (Annex 5th floor)