Berggren, W. A., M. F. Glaessner, Adolf Papp, A. R. Palmer, J. A. Van Couvering, A. W. Norris, A. H. Müller, et al. 1979. “Part A, Introduction, Complete Volume”. Treatise on Invertebrate Paleontology, January. https://doi.org/10.17161/dt.v0i0.5534.