The Ceratopsia - Hatcher, J. B. (John Bell) 1861-1904.; Lull, Richard Swann 1867-1957.; Osborn, Henry Fairfield 1857-1935.; Marsh, Othniel Charles 1831-1899. (Washington Govt. Print. Off., 1907)
Bibliography: p. 196-198.
Keywords: Ceratopsia