A Natural History of the Western Interior Sea. Indiana University Press, 320 pp. Lane, H. H. 1946. A survey of the fossil vertebrates of Kansas, Part III, The Reptiles, Kansas Academy Science, Transactions 49(3):289–332, figs. 1–7. Marsh, O. C. 1871. Scientific expedition to the Rocky Mountains. American Journal of Science ser. 3, 1(6):142–143. Marsh, O. C. 1871. Notice of some new fossil reptiles from the Cretaceous and Tertiary formations. American Journal of Science, Series 3, 1(6):447–459. Marsh, O. C. 1871. Note on a new and gigantic species of Pterodactyle. American Journal of Science, Series 3, 1(6):472. Marsh, O. C. 1872. Discovery of additional remains of Pterosauria, with descriptions of two new species. American Journal of Science, Series 3, 3(16):241–248. Marsh, O. C. 1881. Note on American pterodactyls. American Journal of Science, Series 3, 21(124):342–343. Marsh, O. C. 1882. The wings of Pterodactyles. American Journal of Science, Series 3, 23(136):251–256, pl. III. Marsh, O. C. 1884. Principal characters of American Cretaceous pterodactyls. Part I. The skull of Pteranodon. American Journal of Science, Series 3, 27(161):422–426, pl. 15. Russell, D. A. 1988. A check list of North American marine cretaceous vertebrates Including fresh water fishes, Occasional Paper of the Tyrrell Museum of Palaeontology, (4):57. Schultze, H.-P., L. Hunt, J. Chorn and A. M. Neuner, 1985. Type and figured specimens of fossil vertebrates in the collection of the University of Kansas Museum of Natural History, Part II. Fossil Amphibians and Reptiles. Miscellaneous Publications of the University of Kansas Museum of Natural History 77:66 pp. Seeley, Harry G. 1871. Additional evidence of the structure of the head in ornithosaurs from the Cambridge Upper Greensand; being a supplement to "The Ornithosauria." The Annals and Magazine of Natural History, Series 4, 7:20–36, pls. 2–3. (Discovery of toothless pterosaurs in England) Shor, E. N. 1971. Fossils and flies; The life of a compleat scientist – Samuel Wendell Williston, 1851–1918, University of Oklahoma Press, 285 pp. Sternberg, C. H. 1990. The life of a fossil hunter, Indiana University Press, 286 pp. (Originally published in 1909 by Henry Holt and Company) Stewart, J. D. 1990. Niobrara Formation vertebrate stratigraphy. pp. 19–30 in Bennett, S. C. (ed.), Niobrara Chalk Excursion Guidebook, The University of Kansas Museum of Natural History and the Kansas Geological Survey. Wellnhofer, P. 1991. The illustrated encyclopedia of pterosaurs. Crescent Books, New York, 192 pp. Williston, S. W. 1892. Kansas pterodactyls. Part I. Kansas University Quarterly 1:1–13,