@misc{indiciaea3da195a085a,
  title = {A preliminary re-evaluation of the stratigraphy of the Roubidoux Formation of Missouri and correlative Lower Ordovician units in the southern midcontinent},
  author = {J.E. Repetski and James D. Loch and Raymond L. Ethington and R.I. Dresbach},
  year = {2000},
  url = {https://pubs.usgs.gov/publication/70074663},
  note = {Source identifier: 70074663}
}