@misc{indiciaeb13a483c182f,
  title = {The Ibexian Series (Lower Ordovician), a replacement for "Canadian Series" in North American chronostratigraphy},
  author = {R. J. Ross and L. F. Hintze and Raymond L. Ethington and J.F. Miller and M.E. Taylor and J.E. Repetski and J.E. Sprinkle and T.E. Guensburg},
  year = {1993},
  doi = {10.3133/ofr93598},
  url = {https://pubs.usgs.gov/publication/ofr93598},
  note = {Source identifier: ofr93598}
}