Note on a very fine example of Helicoceras stevensoni preserving the outer chamber
By: by R.P. Whitfield.
Contributors: American Museum of Natural History.
Series: Bulletin of the American Museum of Natural History -- v. 14, article 16
Publisher: American Museum of Natural History
Published: 1901
Place of publication: New York
Language: eng
Number of pages: 219
Subjects: Mollusks, Fossil -- Black Hills (S.D. and Wyo.)