Some Middle Cenomanian (Upper Cretaceous) Acanthoceratid Ammonites from the western interior of the United States
By: by William A. Cobban.
Contributors: Geological Survey (U.S.)
Series: U.S. Geological Survey professional paper ;; 1445
Publisher: U.S. G.P.O.; For sale by the Books and Open-File Reports Section, U.S. Geological Survey
Published: 1987
Place of publication: Washington; Denver, CO
Language: eng
Number of pages: 28
Subjects: Acanthoceratidae.; Paleontology -- Cretaceous.; Paleontology -- United States.
Notes: Includes bibliographical references (p. 24-26) and index.