Biostratigraphic classification of the marine Triassic in North America - Silberling, N. J. (Norman John) 1928-2011.; Tozer, E. T. (Edward T.) 1924- (Boulder, Colo. Geological Society of America, 1968)
Bibliography: p. 51-56.
Keywords: Paleontology -- Triassic; Paleontology -- North America; Ammonoidea -- North America