Note 83 — Chapter XIII · SAUROPSIDA.
Reading edition
E.D. Cope, Rep. U.S. Geol. Surv., 1875, vol. II., The vertebrata of the Cretaceous formations of the west. E.D. Cope, P. Boston Soc. 1862, XII. p. 250. O.C. Marsh, Amer. J. Sci., 1872, vol. 3. R. Owen, Quart. J. Geol. Soc., 1877, and 1878.