Spathian (Lower Triassic) ammonoids from western USA (Idaho, California, Utah and Nevada)
By: Jean Guex ... [et al.].
Series: Mémoires de géologie Lausanne -- no. 49; Mémoires de géologie, Lausanne -- no 49.
Publisher: Institut de géologie et paléontologie, Université de Lausanne
Published: 2010
Place of publication: Lausanne
Language: eng
Number of pages: 121
Subjects: Ammonoidea; Paleontology
Notes: Includes bibliographical references (p. 78-81).