Bayer, Frederick M., Horacio J. Harrington, John W. Wells, Erwin C. Stumm, Libbie H. Hyman, Raymond C. Moore, Hilbrand Boschma, Eugenia Montanaro-Gallitelli, Marius Lecompte, and Dorothy Hill. 1956. “Part F, Coelenterata, Complete Volume”. Treatise on Invertebrate Paleontology, January. https://doi.org/10.17161/dt.v0i0.5541.