Studies of the Mowry shale (Cretaceous) and contemporary formations in the United States and Canada,
by John B. Reeside, Jr., and William A. Cobban: a stratigraphic and paleontologic study of five large assemblages of gastroplitine cephalopods interpreted as five species of Neogastroplites having an unusual degree of variability.
- Washington, U.S. Govt. Print. Off., 1960.
- iv, 126 p. illus., maps, diagrs. (2 fold. in pocket) 29 cm.