Middle Campanian (upper Cretaceous) ammonites from the Pecan Gap chalk of central and northeastern Texas
By: by William A. Cobban and W. James Kennedy.
Contributors: Kennedy, W. J.
Series: Shorter contributions to paleontology and stratigraphy -- 1993; U.S. Geological Survey bulletin -- 2073-D
Publisher: U.S. Govt. Print. Off.
Published: 1994
Place of publication: Washington
Language: eng
Number of pages: 11
Subjects: Ammonoidea -- Texas.; Paleontology -- Texas -- Cretaceous.; Paleontology -- Cretaceous.
Notes: "Descriptions and illustrations of some widely distributed ammonites."

Includes bibliographical references (p. 8-9).