Studies of the Mowry shale (Cretaceous) and contemporary formations in the United States and Canada : a stratigraphic and paleontologic study of five large assemblages of gastroplitine cephalopods interpreted as five species of Neogastroplites having an unusual degree of variability /

Autor Reeside, John B. 1889-1958, Cobban, William Aubrey, 1916-2015
Vydáno 1960