| 18 | Geinitz, H. B., 1866. Carbon formation und Dyas in Nebraska: Verhandlungen Kaiserslautern Leopoldin-Carolinische Deutsches Akkademie Naturforsuchen, v. 33, no. 4, 91 p. | 
| 19 | Goldring, W., 1923, The Devonian crinoids of the state of New York. New York State Museum Memoirs, no. 16, 670 p. | 
| 20 | Goldring, W., 1939, Linobrachiocrinus, new name for Linocrinus Goldring, not Kirk, 1938. Journal of Paleontology, v. 13, no. 3, p. 354. |