The upper Cretaceous (Cenomanian) ammonites Metengonoceras Dumbli (Cragin) and M. Acutum Hyatt
By: by William A. Cobban.
Series: U.S. Geological Survey bulletin -- 1690-C; Shorter contributions to paleontology and stratigraphy
Publisher: U.S. G.P.O.
Published: 1987
Place of publication: [Washington]
Language: eng
Subjects: Metengonoceras -- West (U.S.); Ammonoidea -- West (U.S.); Paleontology -- West (U.S.) -- Cretaceous.; Paleontology -- Cretaceous.
Notes: "Description and illustrations of important international zonal fossils."

Includes bibliographical references (p. 6-7).