Part O, Arthropoda 1, Complete Volume - Harrington, H. J.; Weller, J. M.; Howell, B. F.; Whittington, H. B.; Sdzuy, Klaus; Schmidt, Herta; Stubblefield, C. J.; Richter, Rudolf; Richter, Emma; Lochman-Balk, Christina; Rasetti, Franco; Størmer, Lief; et al. (Treatise on Invertebrate Paleontology, 1959)