Part Q, Arthropoda 3, ch. 3, p. 180-358 - Scott, H. W.; Levinson, S. A.; van den Bold, W. A.; Berdan, Jean; Shaver, R. H.; Howe, H. V.; Hessland, Ivar; Swain, F. M.; Hanai, Tetsuro; Sohn, I. G.; Sylvester-Bradley, P. C.; Kesling, R. V.; et al. (Treatise on Invertebrate Paleontology, 1961)